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.

Input: Consider Input: Question: What year was the castle that served as the headquarters for the Okazaki Domain built? Passage:Okazaki-shuku was a part of the flourishing castle town surrounding Okazaki Castle, the headquarters for Okazaki Domain. The classic ukiyo-e print by Andō Hiroshige (Hōeidō edition) from 1831 to 1834 depicts a Yahagibashi, one of the few bridges permitted by the Tokugawa shogunate on the Tōkaidō, and one of the longest bridges built in Japan during the early Edo period. Okazaki Castle is depicted in the distance on the far shore of the river. Following the Meiji restoration, with the construction of railroads, the route of what became the Tokaido Main Line was laid down through the nearby village of Hane ( Hane-mura) to the south. Unlike Goyu-shuku and Akasaka-juku, but this did not cause a huge economic decline to Okazaki-shuku. There was a horse-drawn rail line connecting Okazaki to the train station, as well as a teachers' school, which kept the town alive. On the other hand, Okazaki was not able to compete with the growth of Toyohashi, which was located directly on the railway, and which gained city-status first. Because of fires during World War II and the subsequent rebuilding of Okazaki in the post-war years, there are few remnants of the post town remaining today.
 Links: a. Castle town b. Okazaki Castle c. Toyohashi d. Meiji Restoration

Output: b


Input: Consider Input: Question: When was the facility where Bill Clinton and his Vice-President had lunch after  a ceremony on the banks of the scenic New River built? Passage:Ashe County has been home to, produced, or been visited by, several prominent people. It is the hometown of Monte Weaver from Helton who pitched for the Washington Senators and pitched a World Series game in 1933. After being traded from the Senators, he pitched for the Boston Red Sox, before being called into service in World War II. Weaver died in 1994. Albert Hash a well-known and beloved fiddler and instrument maker at one time resided in Lansing. Helen Keller visited an Ashe County native, Marvin Osborne, in 1944 when he was wounded in France in World War II. Loretta Lynn sang at the Central Food Market in West Jefferson in the late 1960s (the Central Food building formally housed a locally owned auto parts store and is now the location of a local restaurant). Roni Stoneman was a visitor to Ashe Park in the 1980s. In 1998, then-President Bill Clinton and his Vice-President, Al Gore, held a ceremony on the banks of the scenic New River to designate it as an American Heritage River. After the ceremony, both men had lunch at the historic Glendale Springs Inn, also located in Ashe County. Fiddle player G. B. Grayson was born in Ashe County in 1887.
 Links: a. World Series b. Glendale Springs Inn c. American Heritage Rivers d. Helen Keller

Output: b


Input: Consider Input: Question: What team did Trinity play in the cup final when Metcalfe was thirty-six years old? Passage:"James Metcalfe - Of the many fine players who figured in Trinity's ranks in the early N.U. days was one who gave outstanding service to the club and in whom the players could always have supreme confidence on the last line of defence. Jimmy Metcalfe soon won recognition as one of the finest full-backs in the country. Born in Cumberland, Jimmy's early football was with Askham-in-Furness (sic Askam-in-Furness), with whom he started in 1890 under R.U. rules. His first club in Yorkshire was Barnsley R.U. and thence to Featherstone. Whilst there, in season 1896-7, he played twice for North v. South - these being R.U. trial matches - and in that season too he figured in all Yorkshire's R.U. county games. It was later - but still in 1897 - that he turned to the Northern Union code and joined Trinity. Here his distinctions were continued and he was a member of the Yorkshire N.U. side which won the County Championship of 1897-8 and again in 1898-9. We can hardly do justice to his fine career in what must necessarily be a short account, but mention must be made of the fact that he played in Trinity's successful Cup Final at Headingley Rugby Stadium, Leeds in 1909, when he was thirty-six years old. And that was not the end. He did not cease to play until 1911 and, in his last match for Trinity gave a final display of his goal-kicking ability by adding three to his wonderful record. Jimmy's record of kicking eleven goals in a match has been equalled twice, but never extended. He set up the record on April 6, 1909, against Bramley at Belle Vue. Trinity's score was 11-15-67 to 2-2-10." 
 Links: a. Rugby League War of the Roses b. Askam and Ireleth c. Askam and Ireleth d. Challenge Cup


Output: d