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: All things change except barbers, the ways of barbers, and the surroundings of barbers. These never change. What one experiences in a barber's shop the first time he enters one is what he always experiences in barbers' shops afterward till the end of his days. I got shaved this morning as usual. A man approached the door from Jones Street as I approached it from Main--a thing that always happens. I hurried up, but it was of no use; he entered the door one little step ahead of me, and I followed in and saw him take the only empty chair, the one headed by the best barber. It always happens so. I sat down, hoping that I might sit in the chair belonging to the better of the remaining two barbers, for he was a bit ahead. I watched the probabilities with strong interest. When I saw that No. 2 was gaining on No. 1, my interest grew to solicitude . When No. 1 was gradually losing the race, my solicitude rose to anxiety. When No. 1 caught up again, and both were about to finish and say "Next!" first, my very breath stood still with the _ . But when I saw that he had lost the race by a single instant, I rose angrily and quitted the shop, to keep from falling into the hands of No. 2; for I have none of that firmness that enables a man to look calmly into the eyes of a waiting barber and tell him he will wait for his fellow-barber's chair. I stayed out fifteen minutes, and then went back, hoping for better luck. Unfortunately, all the chairs were occupied now, and four men sat waiting, silent, and looking bored, as men always do who are waiting their turn in a barber's shop. I sat down and waited. At last my turn came. A voice said "Next!" and I give in to No. 2, of course. It always happens so. I smiled and said that I was in a hurry, and it affected him as strongly as if he had never heard it. He explored my hair with his claws and suggested that it needed trimming . I said I did not want it trimmed. He explored again and said it was pretty long for the present style. I said I had had it cut only a week before. He stopped for a moment, and then asked "who cut it?" I stared at him from the mirror and replied "You did!". Then a dog-fight attracted his attention, and he ran to the window and stayed and watched it...
Question: The author left the barber's shop mainly because _ .
Options: (A) he would like to wait for "No. 1" outside (B) he would rather be served by the best barber (C) he lacked the courage to tell "No. 2" his intention (D) he was angry at the slow speed of "No. 1"

Ex Output:
C

Ex Input:
Article: Two thieves came to a house to steal something. They dug a hole in the wall of the house. There lived many mice in the house. The woman in the house saw a mouse crawl into the house in the moonlight. "Look! In comes one," she said to the man in the house. The thief was so frightened that he hurriedly crawled out of the house and said to the one waiting outside, "She found me when I was just in." But the thief outside didn't believe him, so he said, "Let us try to crawl into the house together." At that time two mice happened to crawl into the house, too. The woman saw the mice and shouted, "In come two, catch them!" The two thieves were terribly frightened. The man in the house said, "You saw them come in but where are they? I will catch them tonight." The two thieves started running away at once. The two thieves wanted to make it clear whether they had been found or not the night before. The next day they acted as men selling sweet potatoes and came before the house. The man and the woman were ploughing in their fields. The rope broke and the woman came home for a rope. She saw two men selling sweet potatoes and wanted to buy some. She picked out two which looked like mice. At the time the man couldn't wait for her any longer in the fields and he ran back from the fields to hurry her up. The woman showed the sweet potatoes to the man and said, "How they look like the two of last night." The man said, "I asked you to fetch a rope, why don't you hurry for it?" The two thieves ran away very quickly without their sweet potatoes.
Question: The two thieves failed to steal anything from the house because _ .
Options: (A) they were found out (B) they were frightened by what they had heard in the house (C) they didn't work together well with each other (D) mice stopped them from doing so

Ex Output:
B

Ex Input:
Article: When several people look at the same person, it is not unusual for each of them to see different things; when you are alone observing one behavior or a person at two different times, you may see different things. The followings are but some of the factors that lead to these varying perceptions(,): (1) Each person's perceptions of others are formed by his or her own cultural conditioning, education, and personal experiences. (2) Sometimes perceptions differ because of what we choose to observe and how we deal with what've observed. It is not necessarily true that person perception is based on observations of a particular person. Your observations may be totally controlled by what others have told you about this person; or you may focus primarily on the situation or role relationship. Most people do not use the same standard to measure their parents, their friends, and strangers. (3) Sometimes we see only what we want to see or don't see what may be obvious to others because of our own needs, desires, or temporary emotional states. This is a process known as selective perception. Selective perception is obviously more difficult when contradictory information is particularly obvious, but it can be done. We can ignore the _ ----"He's basically a good boy so what I saw was not shoplifting ." We can reduce the importance of the contradictory information ----"All kids get into mischief . Taking a book from a bookstore isn't such a big deal." We can change the meaning of the contradictory information--- "It wasn't shoplifting because he was going to pay for it later."...
Question: The first factor given by the author that affects our perception is _ .
Options: (A) our hearing and visual abilities (B) cultural background and personal experiences (C) the experience one learns from others (D) critical measures taken by other people

Ex Output:
B