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: Did other scientists keep blending inheritance open for further consideration? Passage:In the preface, Fisher considers some general points, including that there must be an understanding of natural selection distinct from that of evolution, and that the then-recent advances in the field of genetics (see history of genetics) now allowed this. In the first chapter, Fisher considers the nature of inheritance, rejecting blending inheritance, because it would eliminate genetic variance, in favour of particulate inheritance. The second chapter introduces Fisher's fundamental theorem of natural selection. The third considers the evolution of dominance, which Fisher believed was strongly influenced by modifiers. Other chapters discuss parental investment, Fisher's geometric model, concerning how spontaneous mutations affect biological fitness, Fisher's principle which explains why the sex ratio between males and females is almost always 1:1, reproductive value, examining the demography of having girl children. Using his knowledge of statistics, the Fisherian runaway, which explores how sexual selection can lead to a positive feedback runaway loop, producing features such as the peacock's plumage. He also wrote about the evolution of dominance, which explores genetic dominance. The last five chapters (8-12) include Fisher's more idiosyncratic views on eugenics.
 Links: a. Sexual selection b. Demography c. Blending inheritance d. Parental investment
Example Output: c

Example Input: Question: How old was the person who influenced Abani to join the revolutionary movement when they met? Passage:In 1914, Mukherji met Rash Behari Bose and joined the revolutionary movement. In 1915, he was sent to Japan to acquire weapons for the revolutionaries. According to British intelligence reports, he was active in the Hindu–German conspiracy. In September 1915, while on his return journey to India, he was arrested in Singapore and incarcerated at the Fort Canning prison there, where he remained until he escaped in the autumn of 1917. The exact details of his escape are unclear. Mukherji managed to reach Java in the Dutch East Indies, where he stayed until the end of 1919, living under the name of Dar Shaheer. In Java, he was in contact with Indonesian and Dutch revolutionaries and became a communist. He also travelled to Amsterdam and back. In Amsterdam, he met S.J. Rutgers, who recommended him as a delegate to the Second Congress of the Communist International.
 Links: a. Rash Behari Bose b. Singapore c. S. J. Rutgers d. Communism
Example Output: a

Example Input: Question: Who else starred in Channing the year Tim Conway appeared on the show? Passage:In 1963, Conway guest-starred in Channing playing a job applicant. In 1968, he made two guest appearances on That's Life. From 1970 to 1971, Conway made four appearances on Rowan & Martin's Laugh-In. In 1974, he was in the ABC Afterschool Special as a janitor in the episode: "The Crazy Comedy Concert". In 1987, Conway guest-starred in Faerie Tale Theatre as a mayoral candidate in the episode: "Rip Van Winkle". In 1990, he guest-starred in Newhart as himself in the episode: "Dick and Tim". In 1991, Conway made a cameo appearance in Carol & Company as audience member in the episode "That Little Extra Something". From 1995 to 1996, he guest-starred in Married... with Children as Ephraim Wanker, the hillbilly father of Peg Bundy in four episodes. In 1996 and 1997, Conway guest-starred in ABC's Coach, for which he received the Primetime Emmy Award for Outstanding Guest Actor in a Comedy Series, playing Kenny Montague in the 1996 episode "The Gardener."
 Links: a. American Broadcasting Company b. Channing (TV series) c. That's Life (1968 TV series) d. American Broadcasting Company
Example Output:
b

