In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Q: Article: 'Student Voice' is a student-run education conference discussing education in the 21st century. This event aims to gather the views and opinions of students not only in Victoria and Australia, but around the globe. On Sunday 29 July 2012 students will discuss a series of questions regarding the role of education in the 21st century. By the end of the day they will hopefully have comprehensive answers to be shared with schools around the state and maybe even the world. Students from Preshill would like to invite a group of 5-10 students from your school to participate in this free forum . The event is being held on Sunday 29 July 2012 from 10am-2.30pm at the Hawthorn Town Hall, 360 Burwood Rd, Hawthorn. They are inviting students who are enthusiastic on any of our topics of discussion to present a keynote speech on the day. If you can't make the day, they welcome your written or recorded thoughts on our questions, which will be on display at the event. The topics for discussion: Key Question: What is the ideal 21st century education? 1. Is it a school's place to teach ethics, values, morals, confidence, self-esteem? 2. What are the effects of a uniform national curriculum ? 3. How can we make education more engaging? 4. Should students be compared and ranked against each other? 5. What is the place of social networking and new media technology in education? 6. What is the best way to determine student knowledge? Visit their Facebook page (see below) for updates, to communicate with organizers and other participants, and to indicate your interest in making a keynote speech. 
 Question: What is the aim of the Student Voice Conference? 
 Options: (A) To gather students' ideas about education and share these ideas with schools. (B) To discuss the ideal 21 (C) To invite some students to participate in a free forum about education. (D) To create a chance for students to communicate with each other.

A: A
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Q: Article: In the atmosphere, carbon dioxide acts rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from escaping     According to a weather expert's prediction , the atmosphere will be 3degC warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate.If this warming up took place.the ice caps in the poles would begin to inch,thus raising sea level several meters and severely flooding coastal cities.Also.the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere ,possibly resulting in an alteration of the earth's chief food growing zones.     In the past,concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet.But the weather experts are now paying more attention to West Antarctic.which may be affected by only a few degrees of warming,in other words,by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.     Satellite pictures show that large areas of Antarctic ice are already disappearing.The evidence available suggests that a warming has taken place.This fits the theory that carbon dioxide warms the earth.     However, most of the fuel is burnt in the northern hemisphere,where temperatures seem to be falling.Scientists conclude,therefore ,that up to now natural influences on the weather have gone beyond those caused by man.The question is:Which natural cause has most effect on the weather?     One possibility is the variable behavior of the sun.Astronomers at one research station have studied the hot spots and 'cold' spots (that is, the  ly less hot spots)on the sun.As the sun rotates ,every 27.5 days,it presents hotter or colder faces to the earth,and different aspects to different parts of the earth.This seems to have a considerable effect on the distribution of the earth atmospheric pressure,and consequently on wind circulation.The sun is also changeable over a long term:its heat output goes up and down in cycles,the latest trend being downward.    '     Scientists are now finding shared relations between models of solar weather interactions and the actual climate over many thousands of years,including the last ice Age.The problem is that the models are predicting that the world should be entering a new Ice Age and it is not.One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia of the earth's climate.If this is right, the warming effect of carbon dioxide might thus be serving as a useful opposed balance to the sun's fading heat. 
 Question: It can be concluded that a concentration of carbon dioxide in the atmosphere would_. 
 Options: (A) mean a warming-up in the Arctic (B) raise the temperature of the earth's surface (C) prevent the sun's rays from reaching the earth's surface (D) explain the cause of great changes in the climate in the northern hemisphere

A: B
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Q: Article: How can you build more word-of-mouth advertising  ? In other words, why would your customers want to talk to their friends about their experience of doing business with you? When you perform your service or deliver your product competently  ,  you are just doing what the customer expects. In order to increase the number of the customers who want to share their good experience with their friends, you must make your service impressive, going beyond what is expected. Recently my daughter Dawn and I had lunch with my team members at the Campbell House. The food and service were truly excellent. My daughter asked for her leftovers   to be packed. They were returned to her in aluminum foil   shaped like a swan . Guess what she talked about when she got home? How much more do you think it cost the Campbell House to produce that "Wow!" experience? Answer --not a cent! Disneyland should be an inspiration to us all in providing a "Wow!" experience. What do people talk to their friends about when they come home? "You should have seen how clean that park was! With all of the people there, it's unbelievable! There's not even a gum wrapper on the ground!" Walt Disney understood that cleanliness is marketing. 
 Question: According to the passage, customers would like to share their good experience with their friends if   _  . 
 Options: (A) what they need is provided on time (B) the price of the service is low enough (C) the service is better than they expected (D) the after-sale service is good enough

A:
C
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