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.

[EX Q]: Article: 1826, a Frenchman named Niepce needed pictures for his business .But he was not a good artist.So he invented a very simple camera  .He put it in a window of his house and took a picture of his garden .That was the first photo. The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different processs. In his pictures, you could see everything very clearly, even the smallest details. This kind of photograph was called a daguerreotype. Soon, other people began to use Daguerre's process. Travellers brought back daguerreotypes from all around the world. People photographed famous buildings, cities and mountains. In about 1840, the process was improved. Now photographers could take pictures of people and moving things. The process was not simple. The photographers had to carry lots of film and processing equipment. But this did not stop the photographers, especially in the United States, where from the 1840s daguerreotype artists were popular in most cities. Mathew Brady was a well-known American photographer. He took many pictures of famous people. The pictures were unusual because they were very life-like and full of personality. Brady was also the first person to take pictures of war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible In the 1880s, new inventions began to change photography. Photographers could buy film readymade in rolls. So they did not have to make the film immediately. They could bring it back to their studios and develop it later, meaning that they did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive. With the small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends and favourite places. They called these pictures "snapshots". Photographs became very popular in newspapers in the 1890s. Soon magazines and books also used documentary photographs. These pictures showed true events and people. They were much more real than drawings. Photography had turned into a form of art by the beginning of the 20th century. Some photographs were not just copies of the real world. They showed ideas and feelings, like other art forms. 
 Question: The passage is mainly about  _  . 
 Options: (A) the invention of cameras (B) a kind of new art -- photography (C) the development of photography (D) the different uses of cameras in history
[EX A]: C

[EX Q]: Article: One summer night Ludwig Beethoven took a walk in the suburb   of Bonn. Suddenly a gentle wind came. He heard some music. He listened carefully and found it was his F sonata. He followed the music and came to a small house. There through the window, he saw a girl playing a very old piano and a young man was making shoes beside her, he pushed the door open and went in. The host received him very warmly and told him that the girl was his sister, who was blind but very fond of music. They couldn't afford to send her to a master.  So she was only trying to play some music she heard the neighbors play. She knew it was the work of a great composer. Beethoven was very much moved. Suddenly the candle was blown out. Moonlight struck on the girl's slender figure. Then Beethoven played music for them. He played so wonderful that the brother and sister were amazed. That was his famous Clair de lune. 
 Question: Beethoven heard the music because   _  . 
 Options: (A) it was played loudly (B) there was a slight wind (C) the piano was old (D) he stopped walking
[EX A]: B

[EX Q]: Article: I can still remember it as if it happened yesterday. I was a college freshman and had stayed up most of the night before laughing and talking with friends. Now just before my first class of the day my eyelids were feeling heavier and heavier and my head was drifting down to my desk to make my textbook a pillow. A few minutes' nap time before class couldn't hurt, I thought. Boom! I lifted my head immediately and my eyes opened wider than saucers. I looked around with my heart beating quickly trying to find the cause of the noise. My young professor was looking back at me with a _ , boyish smile on his face. He had intentionally dropped the pile of textbooks he was carrying onto my desk. "Good morning!" he said, still smiling. "I'm glad to see everyone is awake. Now let's get started." For the next hour I wasn't sleepy at all. It wasn't from the shock of my professor's textbook alarm clock either. Instead, it was from the attractive discussion he led. With knowledge and good humor, he made the material come alive. His insights were full of both wisdom and loving kindness. And the enthusiasm and joy that he taught with were contagious  . I left the classroom not only wide awake, but a little smarter and a little better as well. I learned something far more important than not sleeping in class that day too. I learned that if you are going to do something in this life, do it well, do it with joy, and make it an expression of your love. What a glorious place this world would be if all of us did our work joyously and well! What a beautiful world we could create if every doctor, teacher, musician, cook, waitress, poet, miner, farmer, and laborer made their work an expression of their love! Don't sleepwalk your way through life then. Wake up! Let your love fill your work and your soul. Life is too short not to live it well. 
 Question: What did the author want to do just before his first class of the day? 
 Options: (A) Talk with his friends. (B) Take a short sleep. (C) Get his eyes examined. (D) Stay away from the class.
[EX A]:
B

