In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Ex Input:
Question: Did Vordtriede's family join him in America beside his mother? Passage:After the Nazis came to power, he emigrated to Switzerland in 1933 and to the United States later. He began his studies in Zurich and worked part-time as a house teacher. Meanwhile, he wrote articles and book reviews for the Neue Zürcher Zeitung, using several pseudonyms because of prohibition of work. He earned his PhD and taught French and German Literature at various universities, including Princeton University and University of Wisconsin-Madison. During a journey to Europe, Vordtriede was surprised by the outbreak of the Second World War and interned as an Enemy alien in occupied France. By interventions, he became free months later and was allowed to go back to America. He met his mother in New York City late in 1941, who also emigrated to the USA. He received the American citizenship in 1946 and became a Guggenheim Fellow in 1957. His sister Fränze emigrated in 1947 and went to Philadelphia.
 Links: a. University of Wisconsin–Madison b. Philadelphia c. University of Wisconsin–Madison d. Switzerland

Ex Output:
b


Ex Input:
Question: On what day was the inauguration of the president who held a ceremony on the banks of the scenic New River to designate it as an American Heritage River? Passage:Ashe County has been home to, produced, or been visited by, several prominent people. It is the hometown of Monte Weaver from Helton who pitched for the Washington Senators and pitched a World Series game in 1933. After being traded from the Senators, he pitched for the Boston Red Sox, before being called into service in World War II. Weaver died in 1994. Albert Hash a well-known and beloved fiddler and instrument maker at one time resided in Lansing. Helen Keller visited an Ashe County native, Marvin Osborne, in 1944 when he was wounded in France in World War II. Loretta Lynn sang at the Central Food Market in West Jefferson in the late 1960s (the Central Food building formally housed a locally owned auto parts store and is now the location of a local restaurant). Roni Stoneman was a visitor to Ashe Park in the 1980s. In 1998, then-President Bill Clinton and his Vice-President, Al Gore, held a ceremony on the banks of the scenic New River to designate it as an American Heritage River. After the ceremony, both men had lunch at the historic Glendale Springs Inn, also located in Ashe County. Fiddle player G. B. Grayson was born in Ashe County in 1887.
 Links: a. Loretta Lynn b. Al Gore c. History of the Washington Senators (1901–1960) d. Bill Clinton

Ex Output:
d


Ex Input:
Question: Were all the 500cc motorcycles that Mackenzie raced on made by Japanese manufacturers? Passage:Mackenzie, who hails from Fankerton, near Denny, Stirlingshire; won the British Superbike Championship three times from 1996 to 1998 with the Rob McElnea-run Yamaha team, and the British 250cc and 350cc titles twice earlier in his career. He had a long career in the Grand Prix motorcycle racing circuit, debuting in 1984 in the 250cc class. He moved up to the 500cc class in 1986 on a Suzuki before spells on Honda and Yamaha motorcycles. He was 4th in the championship in 1990, and finished in the top 10 in the championship on five other occasions. His final racing season was the 2000 British Superbike series, although he did a farewell one-off at Knockhill in 2001 and stood in for the injured Yukio Kagayama at Donington Park in 2003.
 Links: a. 1990 Grand Prix motorcycle racing season b. 1984 Grand Prix motorcycle racing season c. 1984 Grand Prix motorcycle racing season d. Suzuki

Ex Output:

d