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.

Example Input: Question: When was the facility where Bill Clinton and his Vice-President had lunch after  a ceremony on the banks of the scenic New River built? 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. World Series b. Glendale Springs Inn c. American Heritage Rivers d. Helen Keller
Example Output: b

Example Input: Question: Was Bracewell born in the United Kingdoms? Passage:Born in Colne, Lancashire, Bracewell began his career in non-league football with Trawden. He then signed with league club Burnley, but never made a league appearance, and so made his professional debut with Tranmere Rovers in 1959, making 28 league appearances in two seasons. Bracewell then played non-league football with Nelson, and with Canadian side Toronto Italia, before returning to English league football with Norwich City. However, he didn't make a single appearance for Norwich, and soon signed for Lincoln City, where he made 23 league appearances between 1963 and 1965. After leaving Lincoln, Bracewell played non-league football with Margate, before signing with Bury, where he made 1 league appearance. Bracewell then spent two seasons in Canada with the Toronto Falcons, and returned briefly to England to play with Rochdale. Bracewell then returned to the NASL to play with the Atlanta Chiefs, the Atlanta Apollos and the Denver Dynamos.
 Links: a. Tranmere Rovers F.C. b. Lincoln City F.C. c. Norwich City F.C. d. Colne
Example Output: d

Example Input: Question: How old is the city where Bossart was born? Passage:Karel Bossart was born on February 9, 1904 in Antwerp, Belgium. He graduated in Mining Engineering at the Université libre de Bruxelles in 1924. After winning a scholarship—under the Belgian American Education Foundation—to M.I.T. to study aeronautical engineering he remained in the US working for various aircraft companies. In 1945 he was chief of structures at Convair and proposed to the United States Air Force that a missile could be developed with a range of 8000 km. The Air Force was skeptical of Bossart's proposal, partly wishing to preserve the priority of Strategic Bombers, but granted him a limited contract to develop a prototype. Bossart's major innovation was the use of a monocoque design in which structural support was maintained by pressure within the inelastic fuel tanks. After a series of tests in 1947 the Air Force lost interest and Bossart was instructed to abandon the research, but by 1951 the escalation of the Cold War enabled Bossart to revive the project that became known as 'Atlas'. In 1955 the CIA reported that Soviet Russia had made swift progress on its own ICBM programme and Atlas became a crash project of the highest national importance. Bossart used this opportunity to advance work with high energy cryogenic fuels that resulted in the Centaur upper stage.
 Links: a. Université libre de Bruxelles b. Antwerp c. Monocoque d. Russian Soviet Federative Socialist Republic
Example Output:
b