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: Who owns the tallest building in Dubai? Passage:Dubai, the largest city in the United Arab Emirates, is home to many modern high-rises, 108 of which stand taller than . The tallest building in Dubai is the Burj Khalifa, which rises and contains 163 floors. The tower has stood as both the tallest building in the world and the tallest man-made structure of any kind in the world since its completion in January 2010. The second-tallest building in Dubai is the Marina 101, which also stands as the world's second tallest residential skyscraper. The skyscrapers of Dubai are, for the most part, clustered in three different locations. The land along E 11 Road was the first to develop, followed by the Dubai Marina neighborhood and the Business Bay district.
 Links: a. List of tallest buildings b. Burj Khalifa c. Burj Khalifa d. Burj Khalifa
Example Output: b

Example Input: Question: How long had Kortrijk been a team when Gillenken made his debut for OH Leuven? Passage:Gillekens made his debut for OH Leuven in the 2014–15 Belgian Cup in the sixth round match against Kortrijk, a 1-3 loss, although that season he was part of the reserves and only fourth goalkeeper behind Logan Bailly, Yves Lenaerts and Senne Vits. Later that season he also played one match in the 2014–15 Belgian Second Division against Mons. Although Gillekens was promoted to third keeper for the 2015–16 season, he did not play a single match that season. Following the relegation from the 2015–16 Belgian Pro League, first goalkeeper Rudy Riou was released while second goalkeeper Yves Lenaerts had already signed for ASV Geel. As such, Gillekens was promoted to first goalkeeper for the 2016–17 season in the Belgian First Division B. During the winter 2017–18 transfer window OH Leuven signed Kawin Thamsatchanan, captain of the Thailand national football team and soon thereafter Gillekens was demoted to reserve goalkeeper. Following Thamsatchanan's injury during the 2018–19 season, Gillekens again became first goalkeeper for a few matches before then being surpassed by Laurent Henkinet. Towards the end of the season, Gillekens was even demoted to third goalkeeper with Thamsatchanan now taking his place on the bench and after the final match of the season it became clear that Gillekens would not be signing a new deal at OH Leuven.
 Links: a. K.V. Kortrijk b. 2016–17 Belgian First Division B c. Yves Lenaerts d. Thailand national football team
Example Output: a

Example Input: Question: Who is the spouse of the candidate from Arkansas who won the state with ease in 1992 and 1996? Passage:For the better part of a century, Missouri has been reckoned as the nation's bellwether state. Prior to 2008, since 1904, Missouri had voted for the winner in every presidential election except in 1956 when the state narrowly voted for Democrat Adlai Stevenson of neighboring Illinois over incumbent Republican President Dwight D. Eisenhower. In recent years, however, it has gradually been trending Republican. Although Bill Clinton of neighboring Arkansas won the state with ease during both of his elections in 1992 and 1996, Al Gore and John Kerry considered the Show-Me State a lost cause and did not campaign much there. Although Barack Obama is from neighboring Illinois, at first he likewise put the state as a secondary concern in relation to other swing states such as Ohio and Virginia where he thought he had more of a chance. As his lead diminished in the summer months, he and McCain moved the campaign to more Democratic-friendly states, as McCain maintained a comfortable polling lead in Missouri. Similar hypothetical general match-up polls taken between McCain and Hillary Rodham Clinton, however, showed Clinton always leading in Missouri.
 Links: a. Bill Clinton b. Arkansas c. Arkansas d. Dwight D. Eisenhower
Example Output:
a