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: Which college where Harben was educated has the highest enrollment? Passage:He was the son of Henry Andrade Harben and the grandson of Sir Henry Harben who founded Prudential Assurance, Harben was educated at Eton College and Magdalen College, Oxford, before qualifying as a barrister. He married Agnes Helen Bostock. He stood unsuccessfully for the Conservative Party in Eye at the 1900 general election, but by 1902 had switched his affiliation to the Liberal Party. He stood for the Liberal Party in Worcester at the 1906 general election. Although he lost the election, he petitioned the election court on the grounds that supporters of the winner, George Henry Williamson, had engaged in widespread bribery. He won the case, but the seat was left vacant until a by-election in 1908, and the local Liberal Party adopted a new candidate. Harben next stood in Portsmouth at the December 1910 general election, but came bottom of the poll.
 Links: a. 1900 United Kingdom general election b. 1900 United Kingdom general election c. 1900 United Kingdom general election d. Eton College
Example Output: d

Example Input: Question: Has the voice actor for the White Rabbit voiced any other characters? Passage:The film follows the storyline of the book closely, save for adding some scenes from Through the Looking-Glass. It also changes the opening real world scene from Alice and her sister sitting at a riverbank to Alice in her bedroom, reluctantly practicing the song "Cherry Ripe", which she is expected to perform at a garden party. (The party guests are played by the same actors as the Wonderland characters and are shown as resembling them in appearance and personality, in a similar manner to the MGM version of The Wizard of Oz. The toys in Alice's room also reflect the residents of Wonderland). Thanks to stage fright and constant nagging from her confident governess (Dilys Laye), Alice runs out of the house and hides herself in the woods nearby, planning to stay hidden until the party has ended. However, an apple floats down from the tree and seems to hover in Alice's face. She is suddenly distracted by a human-sized White Rabbit (voiced by Richard Coombs) rushing by. Curious, Alice follows the White Rabbit, falling down his rabbit hole and ending up in Wonderland.
 Links: a. Dilys Laye b. Bedroom c. Richard Coombs d. White Rabbit
Example Output: c

Example Input: Question: Of the waters David became an experienced sailor, which one is deeper? Passage:Born into a poor family in Linlithgowshire in Scotland, Bartholomew joined the Merchant Navy at a young age and became a highly experienced sailor, travelling to the Baltic Sea and the West Indies, working on hired merchant ships during campaigns against French islands there at the outbreak of the French Revolutionary Wars. He later served on Greenland whalers, but in 1795 was seized by a press gang at Wapping and forcibly recruited into the Royal Navy. Due a superior education (although where he obtained this education is unknown), Bartholomew was rapidly promoted to midshipman, serving in numerous theatres and becoming a favourite of Admiral Sir Home Riggs Popham. Bartholomew was present at the surrender of the Dutch fleet in 1799, on HMS Romney in the East Indies and in 1802 was in charge of the ship's chronometers during a voyage to the Red Sea. The Peace of Amiens in the same year saw a reduction in the Navy and Bartholomew was placed in reserve.
 Links: a. French Revolutionary Wars b. Baltic Sea c. Midshipman d. Merchant navy
Example Output:
b