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: Why do people run? That is, why do thousands get up early and put their knees and ankles and hearts and lungs through the hell of 10,000 meters on the roads? For those who stick with it and are lucky, they get into another world: a state of physical and mental grace reached when their blood is racing through every vein . And in Austin, those who long to get better, even when they know it's impossible, hang on Gilbert's every word. Gilbert's methods are simple. It's all about form: how the arms move and the feet land. He pushes his students hard. When they feel like they're about to die, they look at Gilbert's scars -- the burns along his right arm, and then to his right leg, where the flames ate down to the bone. Whatever they feel, how bad, really, could it be? "He gets people to believe in themselves," says Lisa Spenner, one of the _ , who are crazy about Gilbert. "He treats everyone like they're amazing." If Gilbert is their savior, they are his saviors too. "Eventually, I realized I had to help people. When I help people, I feel good," he says. Gilbert's right leg was so badly burnt that the knee was stuck at a 90-degree angle. The doctor said it would take six months to heal. Frustrated, Gilbert got on a bike. The biking led to walking, which finally led to running a year after he had been left to die. In truth, runners don't race other runners. They race against themselves to conquer their wills. So Gilbert spent the spring and summer of 2007 trying to do that, racing men faster than he is, knowing it would make him better. Gilbert's students, of course, keep rooting for him, though sometimes they wonder, "How much better can he get?" After all, they see him as more than just a runner and a coach. He's a flesh-and-blood symbol: the daily struggle to show what you're made of.
Question: What do we learn about Gilbert after reading the passage?
Options: (A) He used to work as a fireman. (B) He has determination and strong will-power. (C) He learnt running from a coach. (D) He was advised to ride a bike when he was badly burnt.

Ex Output:
B

Ex Input:
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.

Ex Output:
C

Ex Input:
Article: If you think that running marathons will help you live a long and healthy life,new research may come as a shock.According to a recent scientific study,people who do a very _ workout are as likely to die as people who do no exercise at all. Scientists in Denmark have been studying over 1,000 joggers and non-joggers for 12 years.The death rates from the sample group suggest that people who jog at a moderate pace two or three times a week for less than two and a half hours in total are least likely to die. The best speed to jog at was found to be about 5 miles per hour.The research suggests that people who jog more than three times a week or at higher speeds of over 7 mph die at the same rate as non-joggers.The scientists think that this is because strenuous exercise causes structural changes to the heart and arteries .Over time,this can cause serious injuries. Peter Schnohr,a researcher in Copenhagen,said,"If your goal is to decrease risk of death and improve life expectancy,jogging a few times a week at a moderate pace is a good strategy .Anything more is not just unnecessary,and it may be harmful." The implications of this are that moderate forms of exercise such as tai chi,yoga and brisk walking may be better for us than "iron man" events,triathlons and long-distance running and cycling.According to Jacob Louis Marott,another researcher in the study,"You don't actually have to do that much to have a good impact on your health.And perhaps you shouldn't actually do too much".
Question: According to the scientists,why is too much exercise harmful?
Options: (A) It may injure the heart and arteries. (B) It can make the body tired out. (C) It will bring much pressure. (D) It consumes too much energy.

Ex Output:
A