In this task, you're given an article, a question which often contains a blank, four options (associated with "A", "B", "C", "D") and the answer to that question. Your task is to classify whether the given answer is correct or not by providing "Yes" or "No", based on the article.
Example: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay. 
 Question: Researchers did experiments on kids in order to find out _ . 
 Options: (A) how they really feel when they are learning (B) whether mood affects their learning ability (C) what methods are easy for kids to learn (D) the relationship between sadness and happiness 
 Answer: B
Example solution: Yes
Example explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment. Hence, B is the correct answer and output is Yes.

Problem: Article: Earth Day has come and gone, but it's a fact of daily life that 1.6 billion people around would have no electricity in their homes. Instead, most of them use wood, coal or even animal waste to heat and cook in their homes ,which also gives off greenhouse gases, causing indoor air pollution that kills 1.6million people a year, most of whom are children and women. It's not expected to improve much, and in Africa it's becoming worse now. By 2030, when the Earth's population will be likely to top 8billion, 1.3 billion people will still lack electricity. Of those, 700 million will be in Africa, and 490 million in South Asia. Ghana, in West Africa, most of the northern half of the country lives without lights. As a result, three out of four Ghanans in the north are without electricity to refrigerate with and to cook with, to study with and to start businesses with. Like most others around the world in the same situation, these Ghanans use traditional fuels( wood, coal, animal waste) to meet their cooking needs. What would electricity for everyone around the world cost? The International Energy Agency, which is made up of 28 member countries, figures it would run35 billion dollars a year from 2008 to 2030 to reach _ . The United Nations has been busy with the issue, organizing a meeting on April 28 hosted by Secretary-General Ban Kimoon. ' Energy services are very important formeeting basic human needs, reducing poverty, creating and getting together wealth and keeping advances in social development," He said in an announcement. 
 Question: How many people still lack electricity in the world now? 
 Options: (A) 1.6 billion. (B) 1.6 million (C) 1.3 billion (D) 700 million 
 Asnwer: C

Solution: No