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 Input:
Article: The fact that blind people can see things using parts of their bodies apart from their eyes may help us to understand our feelings about color.If they can sense color differences, then perhaps we, too, are affected by color without knowing it.Salesmen have discovered by experience over a long period of time that sugar sells badly in green wrappings, that blue foods are considered not agreeable to the taste, and that cosmetics should never be packed in brown.These discoveries have grown into a whole subject of color psychology. Some of our preferences are clearly psychological.Dark blue is the color of the night sky and therefore connected with calm, while yellow is a day color connected with energy and encouragement.Experiments have shown that colors, partly because they are connected with psychology, also have a direct effect on people's mind.People in bright red surroundings show an increase in breathing speed, heartbeat and blood pressure.Red is exciting.Pure blue has exactly the opposite effect; it is a calming color.Being exciting, red was chosen as the signal for danger, but a closer study shows that a bright yellow can produce a more basic state of alarm, so fire engines in some advanced areas are now rushing around in bright yellow colors that stop buses, trucks and cars.
Question: The passage tells us that salesmen have _ .
Options: (A) tried colors on blind people (B) found out that colors affect sales (C) developed a special subject of color psychology (D) discovered the relationship between color and psychology

Ex Output:
B

Ex Input:
Article: A good memory is a great help in learning a language. Everybody learns his own language by remembering what he hears when he is a small child, and some children, like boys and girls who live abroad with their parents, seem to learn two languages almost as easily as one. In school it is not easy to learn a second language because the pupils have so little time for it, and they are busy with other subjects, too. A man's mind is rather like a camera, but it takes photos not only of what we see but of what we feel, hear, smell and taste. When we take a real photo with a camera, there is much to do before the photo is finished and ready to show to our friends. In the same way there is much work to be done before we can keep a picture forever in our mind. Memory is the diary that we all carry about with us.
Question: We usually begin to learn our own language by _ it.
Options: (A) speaking (B) hearing (C) saying (D) teaching

Ex Output:
B

Ex Input:
Article: Two years after the First World War (1914-1918), a small group of soldiers left the army and returned to their hometown in France. Most of them lived well, but one of them was poor. His name was Clinton. Once a year they had supper in Barton's house. Barton was very rich. One evening Barton showed his friends a large gold coin at the supper table. The coin was passed around and praised by everyone. At the same time they were talking and talking. They soon forgot about the coin. After supper, Barton asked for his coin, but nobody could tell where it was. It was lost. One man said that everyone must be searched. One by one they turned their pockets inside out. Only Clinton refused, however."I didn't steal the coin, and I will not be searched," he said.After that, people turned their heads away from Clinton when they met him. He grew poorer. Soon his wife died. A few years later, Barton had his house repaired. The lost coin was found under the floor. Barton felt sorry and went to Clinton to apologize. "But," he asked, "you knew the coin was not in your pocket. Why did you refuse to be searched?" "Because I was a thief," Clinton answered. "My pockets were full of food at that time. I had taken some food from the table to carry to my hungry wife and children."
Question: The story took place _ .
Options: (A) in 1920 (B) after 1945 (C) in 1950 (D) 1916

Ex Output:
A