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.

Article: Now we can see a man and his wife at the breakfast table. They are not speaking to each other. They haven't spoken to each other at the breakfast table for years. The husband is reading his newspaper. We can't see his face. The wife looks very worried as she gets a cup of tea ready for him. Today she is using a new kind of tea for the first time. The husband picks up his cup. He isn't interested. He tastes his tea. Suddenly he puts down his newspaper. Something is different! Can it be the tea? He takes another taste. It's wonderful. He smiles. He looks at his wife and says in surprise, "Doris, when did you cut your hair?" Doris is pleased. She answers, "Two months ago." Doris asks, " Herbie , when did your hair begin to become white?" He answers, "A long time ago." Doris says, "We have been together for many years, but we never cared about each other." Now they aren't worried any longer. Breakfast is different. Has a new kind of tea changed their lives?
Question: This story happens _ .
Options: (A) before breakfast (B) after breakfast (C) at home (D) in a teahouse
C

Article: Years ago a John Hopkin's professor gave a group of graduate students this task: Go to the slums . Take 200 boys, between the ages of 12 and 16, and research into their background and environment. Then predict their chances for the future. The students, after consulting social statistics, talking to the boys, and compiling much data, concluded that 90 percent of the boys would spend some time in prison. Twentyfive years later another group of graduate students was given the job of testing the prediction. They went back to the same area. Some of the boys--by then men--were still there, a few had died, some had moved away, but they got in touch with 180 of the original 200. They found that only four of the group had ever been sent to prison. Why was it that these men, who had lived in a breeding place of crime, had such a surprisingly good record? The researchers were continually told: "Well, there was a teacher..." They pressed further, and found that in 75 percent of the cases it was the same woman. The researchers went to this teacher, now living in a home for retired teachers. How had she exerted this remarkable influence over that group of children? Could she give them any reason why these boys should have remembered her? "No," she said, "no I really couldn't." And then, thinking back over the years, she said amusingly, more to herself than to her questioners: "I loved those boys."
Question: What were a group of graduate students instructed to do?
Options: (A) To research into the living conditions of the poor citizens. (B) To foretell what the future might have in store for poor kids. (C) To study 200 boys in the slums between 12 to 16 and predict their future. (D) To survey the background and environment of 200 teenagers.
C

Article: There is an English saying: "Laughter is best medicine." Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter really can improve people's health. Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercises. It increases blood pressure, the heart beating and breathing. It also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial. Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated the pain for the longest time was the groups which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which _ both stress and pain. As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients' condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those who are caused by laughter.
Question: The main idea of the passage is _ .
Options: (A) laughter and physical exercises have similar effects. (B) smile can produce the same effects as laughter (C) pain can be reduced by laughter (D) laughter is best medicine
D