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.

Example Input: Article: Rock and roll music developed in the United States in the early nineteen-fifties. It was based on the music called rhythm and blues that was performed by African American musicians. Early rock and roll singers developed their own kinds of music. Elvis Presley, Chuck Berry, the Beach Boys, and Bob Dylan were the most popular rock and roll musicians in the early 1960's. All were American. Then, in 1964, a new rock and roll group from England invaded America: the Beatles. Some people say the Beatles' music shook America like an earthquake. The Beatles changed rock and roll forever. Their early songs were influenced by American rock and roll musicians, including Chuck Berry. But the Beatles looked different and sounded different from any musical group before them. The Beatles released their first album in the United States in 1964, when all of the top five records in America were by the Beatles. In 1967, they released an album called "Sergeant Pepper's Lonely Hearts Club Band." It was one of the first "concept" albums. That is, all the songs were linked by a common story or idea. The popularity of the Beatles led the way for more rock and roll bands from England to become popular in America. The Rolling Stones was the most important of these bands. The Rolling Stones is one of the few groups from the 1960's that is still performing and recording today. In 1965, the group recorded one of its most famous songs, "Satisfaction". The musical instrument most linked to rock and roll is the guitar. Experts say Jimi Hendrix was one of the most influential guitar players in rock and roll during the late 1960's. His "Purple Haze" was liked by many people. By the 1970's, rock and roll music became known as rock music. It expanded into many new forms. For example, there was country rock, hard rock, acid rock, and heavy metal rock. Punk rock, jazz rock, and glitter rock. In the middle 1970's, experts say rock music regained some of the energy of early rock and roll. Bruce Springsteen and the E Street Band became popular with their album "Born to Run". Springsteen's music was like the lively rock and roll music of the early nineteen-sixties. Many of his songs were about social issues. He sang about the effects of unemployment and the war in Vietnam.
Question: The main topic of this passage is _ .
Options: (A) the history of American music (B) the famous rock and roll groups (C) the new forms of rock and roll music (D) the development of rock and roll music
Example Output: D

Example Input: Article: GAOMI, Shandong, Oct.11( Xinhua)--Chinese writer Mo Yan said last Thursday that he was "very surprised" at winning the Nobel Literature Prize. Speaking to reporters at a hotel in his hometown Gaomi city in east China's Shandong Province, Mo said, "(I was)very surprised upon winning the prize because I felt I was not very senior in terms of qualification(among Chinese writers).There are many good writers and my ranking was not so high." "I am very happy," he said."I was having dinner when I received the news.I was surprised." "Thank you for coming all the way to Gaomi.This should be a season of red sorghum, but no such crop is planted any more.I believe none of you have seen the crop," he said. "The Nobel Literature Prize is a very important literature prize, but not the top award.It represents the opinions of the jury( ).I am satisfied with my major works and I still keep writing by hand.My works are Chinese literature, which is part of world literature.They show the life of Chinese people as well as the country's unique culture and folk customs.Meanwhile, my novels described human beings in the broad sense.I wrote in the perspective of a human being.These works stand beyond regions and ethnic groups," he said. "The folk arts and folk culture accompanied my growth and I was influenced by the cultural elements I witnessed through my childhood.When I picked up the pen for literature creation, the folk cultural elements inevitably entered my novels and affected and even determined the artistic styles of my works," he added. Mo's win brought joy to other writers and readers throughout the country as he is the first Chinese national to win the Nobel Literature Prize in its century--long history. Born into a farmer's family in a village in Gaomi, Mo has been known since the late 1980s for his novels such asBig BreastsandWide Hips and Red Sorghum, which was later adapted into a film by director Zhang Yimou.
Question: Mo Yan was surprised at winning the Nobel Prize because he felt _ .
Options: (A) he was not the best writer in China (B) he was not as famous as other writers (C) he was born in a farmer's family (D) he didn't have good education
Example Output: A

Example Input: Article: One of the greatest gifts one generation can give to other generations is the wisdom it has gained from experience. This idea has inspired the award-winning photographer Andrew Zuckerman. He interviewed and took photos of fifty over-sixty-five-year-olds all over the world. His project explores various aspects of their lives. The photos and interviews are now available on our website. Click on the introductions to read the complete interviews. Let us now have a culture of peace. ----Federico Mayor Zaragoza, Spain Federico Mayor Zaragoza obtained a doctorate in pharmacy from the Complutense University of Madrid in 1958. After many years spent in politics, he became Director-General of UNESCO in 1987. In 1999, he created the Foundation for a culture of Peace, of which he is now the president. In addition to many scientific publications, he has published four collections of poems and several books of essays. Writing is a discovery. ----Nadine Gordimer, South Africa Due to a weak heart, Nadine Gordimer attended school and university briefly. She read widely and began writing at an early age. She published her first short story at the age of fifteen, and has completed a large number of works, which have been translated into forty languages. In 1991, Gordimer won the Nobel Prize for Literature. Jazz is about the only form of art today. ----Dave Brubeck, USA Dave Brubeck studied music at the University of the Pacific and graduated in 1942. After World War Two he was encouraged to play jazz. In 1951, he recorded his first album . Brubeck's 1959 album has become a jazz standard. He received a Grammy Lifetime Achievement Award in 1996. For more figures CLICK HERE.
Question: Why did Andrew Zuckerman choose the fifty elders for his project?
Options: (A) Because their wisdom deserves to be passed on. (B) Because they are physically impressive. (C) Because their accomplishments inspired him. (D) Because they have similar experiences.
Example Output:
A