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: In 1958 did the Linguistic Society of America have more total members than the American Philosophical Society? Passage:He was educated in the German Gymnasium, where he learned the classical languages, and trained as an Indo-Europeanist and a historical and comparative linguist in universities in Munich, Zurich, Padua, and Florence. His refugee status compelled these moves (his grandparents were Jewish, and by 1933 Jews were forbidden to attend German universities). In 1939 he escaped to the United States, where he was at first a research assistant at Yale. He taught at the University of Pennsylvania from 1948 until his retirement in 1985. He was a member of the Linguistic Society of America, of which he was elected President in 1958, and a member of the American Philosophical Society for more than 30 years. He was elected to the National Academy of Sciences. He spent a year at Oxford in 1976 and was elected a Corresponding Fellow of the British Academy in 1986.
Links: a. Indo-European studies b. Historical linguistics c. Historical linguistics d. American Philosophical Society
Example Output: d

Example Input: Question: How many seasons did the television show that Earl Gaines appeared on air? Passage:Breaking away from the confines of the group, Gaines became part of the 1955 R&B Caravan of Stars, with Bo Diddley, Big Joe Turner, and Etta James. Their tour culminated with an appearance at New York's Carnegie Hall. Without any tangible success, Gaines recorded for the Champion and Poncello labels for another few years, as well as joining Bill Doggett's band as lead vocalist. In 1963, he joined Bill "Hoss" Allen's repertoire of artists, and by 1966 had issued the album The Best of Luck to You, seeing the title track reach the Top 40 in the US R&B chart. He appeared on the television program The !!!! Beat, and later released material for King and Sound Stage 7, including his cover version of "Hymn Number 5". Recordings made between 1967 and 1973 for De Luxe were reissued in 1998. On many of his De Luxe recordings in the late 1960s and early 1970s, Gaines was backed by Freddy Robinson's orchestra.
Links: a. Abu Talib (musician) b. Big Joe Turner c. The !!!! Beat d. Champion Records
Example Output: c

Example Input: Question: Who was the first person to ever reach the location that Wright learned of Scott's forthcoming expedition to? Passage:Born in Toronto, Ontario, Canada in 1887, the son of an insurance executive, Wright grew up in the Toronto neighbourhood of Rosedale. He was educated at Upper Canada College where he also became head boy. Despite wearing glasses, he excelled in sports and his spirit of adventure saw him spend some of his youth prospecting and canoeing in Canada's unmapped Far North. He studied Physics at the University of Toronto and won a scholarship for postgraduate study at Gonville and Caius College, Cambridge, England, undertaking research in cosmic rays at the Cavendish Laboratory from 1908-10. There he met Douglas Mawson, who had recently returned from Shackleton's 1907-9 British Antarctic Expedition, known as the Nimrod Expedition. Upon learning of Scott's forthcoming expedition to the geographic South Pole, Wright applied to join but was rejected. Undaunted, he walked from Cambridge to London, where he applied in person; this time, Scott accepted, and Wright was hired as expedition glaciologist and assistant physicist.
Links: a. South Pole b. Ontario c. Cavendish Laboratory d. Ernest Shackleton
Example Output:
a