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.

Q: Article: Adding math talk to story time at home is a winning factor for children's math achievement, according to a new research from the University of Chicago. The study from psychologists Sian Beilock and Susan Levine shows a marked increase in math achievement among children whose families used Bedtime Math, an iPad app that delivers engaging math story problems for parents and children to solve together. Even children who used the app with their parents as little as once a week saw gains in math achievement by the end of the school year. The app's effect was especially strong for children whose parents tend to be anxious or uncomfortable with math. Previous research from this group has demonstrated the importance of adults' attitudes about math for children's math success. For example, a recent study found that math-anxious parents who help their children with math homework actually weaken their children's math achievement. The new findings demonstrate that structured, positive interactions around math at home can cut the link between parents' uneasiness about math and children's low math achievement. "Many Americans experience high levels of anxiety when they have to solve a math problem, with a majority of adults feeling at least some worries about math," said Beilock, professor in Psychology and author of Choke, a book about stress and performance. "These math-anxious parents are probably less likely to talk about math at home, which affects how competent their children are in math. Bedtime Math encourages a dialogue between parents and kids about math, and offers a way to engage in high-quality math interactions in a low-effort, high-impact way." Study participants included 587 first-grade students and their parents. Families were given an iPad installed with a version of the Bedtime Math app, with which parents and their children read stories and answer questions involving math, including topics like counting, shapes and problem-solving. A control group received a reading app that had similar stories without the math content and questions related to reading comprehension instead. Children's math achievement was assessed at the beginning and end of the school year. Parents completed a questionnaire about their nervousness with math. The more times parents and children in the math group used the app, the higher children's achievement on a math assessment at the end of the school year. Indeed, children who frequently used the math app with their parents outperformed similar students in the reading group by almost three months in math achievement at year's end.
Question: Bedtime Math is an iPad app that _ .
Options: (A) requires parents and children to answer reading comprehension questions (B) assesses children's math achievement and parents' nervousness with math (C) teaches children how to count, recognize shapes and solve practical problems (D) encourages children together with their parents to solve math story problems

A: D
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Q: 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.

A: C
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Q: Article: Here are some of the best movies you like. I believe they can accompany you to spend your dull weekend. In this story a computer hacker searches for the truth behind the mysterious force . In the 22nd century it turns out that the world is controlled by a magic computer system called the Matrix and people live in an unreal world. The computer hacker and his comrades overcome much difficulty and at last find the way to take over the Matrix and save the world. This comedy is about J and K, agents in a top secret agency , and they fight bravely with the alien to save the galaxy from a bad-tempered alien "bug" and save the Earth from being destroyed . Harry has lived under the stairs at his aunt and uncle's house. But on his 11th birthday, he learns he's a powerful wizard----with a place waiting for him at the Hogwarts School of Witchcraft and Wizardry. There, he uncovers the truth about his parents' deaths and about the bad man who's to blame . When a satellite crashes in New Mexico, the Air Force sends two men to reach it. To their horror, they discover that the probe carries an alien virus that's already killed all but two of the residents of the town where it landed. Now, scientists must stop the virus from spreading . In the year 2035, James Cole is forced to be sent back to 1996 by scientists to discover the origin of a virus that wiped out nearly all of the earth's population. When Cole is mistakenly sent to 1990, he's arrested and locked up in a mental hospital, where he meets the son of a famous virus expert.
Question: Harry Potter _ .
Options: (A) does't know he's a powerful wizard until he is 11 years old (B) has a happy and pleasant childhood with his aunt and uncle (C) hates to stay at the Hogwarts School of Witchcraft and Wizardry (D) Knows how his parents died before he goes to the Hogwarts school

A:
A
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