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: What golf course did Romero win his first senior title? Passage:Romero first played on the European Tour in 1985 and was a full member from 1988 to 2005. He has 8 tournament victories and seven top twenty placings on the Order of Merit. In 2002 he became the third oldest winner on the European Tour (behind Des Smyth and Neil Coles) when he won the Scottish Open just three days before his 48th birthday. Romero came fifth on the Order of Merit for 2002. Romero turned fifty in 2004, and just a few days later he finished in a tie for second at his first senior tournament, the Senior British Open. In 2005 he won his first senior title at the European Seniors Tour's Travis Perkins Senior Masters, and he won the Wentworth Senior Masters in both 2005 and 2006. In 2006, he lost in a playoff against Loren Roberts for the Senior British Open Championship and won a playoff against Lonnie Nielsen for the JELD-WEN Tradition for his first Champions Tour win and major. He was the Champions Tour's 2006 Rookie of the Year. He won the U.S. Senior Open, his second major, at The Broadmoor in Colorado Springs in 2008.
 Links: a. Senior Open Championship b. Wentworth Senior Masters c. PGA Tour Champions d. Lonnie Nielsen
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 did the frontal sexual position depicted frequently in early Sumerian art get its name? Passage:A vast number of artifacts have been discovered from ancient Mesopotamia depicting explicit heterosexual sex. Glyptic art from the Sumerian Early Dynastic Period frequently shows scenes of frontal sex in the missionary position. In Mesopotamian votive plagues from the early second millennium BC, the man is usually shown entering the woman from behind while she bends over, drinking beer through a straw. Middle Assyrian lead votive figurines often represent the man standing and penetrating the woman as she rests on top of an altar. Scholars have traditionally interpreted all these depictions as scenes of ritual sex, but they are more likely to be associated with the cult of Inanna, the goddess of sex and prostitution. Many sexually explicit images were found in the temple of Inanna at Assur, which also contained models of male and female sexual organs, including stone phalli, which may have been worn around the neck as an amulet or used to decorate cult statues, and clay models of the female vulva.
 Links: a. Hieros gamos b. Ex-voto c. Beer d. Missionary position
Example Output:
d

