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.

Ex Input:
Question: How many years did the owner of the private observatory live? Passage:It would seem that Gill's interests lay elsewhere since after a few years he sold the business, and then spent time equipping Lord Lindsay's private observatory at Dun Echt, Aberdeenshire. In 1874, Gill joined the expedition to Mauritius to observe the transit of Venus. Three years later he went to Ascension Island to observe a near approach of Mars and to calculate its distance. While carrying out these laborious calculations, he was notified of his appointment to the Cape Observatory, which, over the following 27 years he was to refurbish completely, turning it into a first-rate institution. Gill was a meticulous observer and had a flair for getting the best out of his instruments. His solar parallax observations with a heliometer and his calculations of distances to the nearer stars, are testimony to his outstanding work. He recruited Robert Innes to the Cape Observatory.
 Links: a. South African Astronomical Observatory b. Aberdeenshire (historic) c. James Lindsay, 26th Earl of Crawford d. South African Astronomical Observatory

Ex Output:
c


Ex Input:
Question: What was the final score in the loss to the Houston Rockets on March 30? Passage:On December 8, 2017, the Phoenix Suns signed House to a two-way contract with the team. Throughout the rest of the season, House would split his playing time there between Phoenix and their NBA G League squad, the Northern Arizona Suns. House would make his debut with the team a day later, scoring two points and recording a single rebound in 11 minutes of play in a close loss against the San Antonio Spurs. On December 16, House would score a season-high 8 points in 15 minutes of playing time in a 108–106 win over the Minnesota Timberwolves. House was later assigned to the Northern Arizona Suns affiliate alongside Davon Reed on December 28, mainly for healing purposes. House then returned to action on January 5, 2018, recording what was at the time a new season-high 9 points in a loss against the San Antonio Spurs. On February 23, his two-way contract expired, meaning he couldn't be allowed to play for Phoenix again until after the NBA G League's first season under its rebranded name concluded. Once that happened, he was allowed to return to Phoenix for the rest of the season. On March 30, House recorded a career-high 8 rebounds in a heartbreaking, buzzer-beating loss against the Houston Rockets. On April 1, House would record a new season-high with 16 points scored alongside 6 rebounds and 3 assists in a 117–107 loss against the Golden State Warriors. Two days later, House recorded 14 points, 6 rebounds, and a career-high 5 assists in a 97–94 win against the Sacramento Kings. On April 6, House would put up his first start in the NBA against the New Orleans Pelicans. Two days later, House would record career-highs of 22 points and 8 rebounds in a 117–100 loss to the Golden State Warriors.
 Links: a. NBA G League b. Houston Rockets c. Golden State Warriors d. Northern Arizona Suns

Ex Output:
b


Ex Input:
Question: How many people had died in the Border War the year Clark left to fight in it? Passage:Born on August 21, 1883, in Hadley, Indiana, Clark arrived in eastern Idaho Territory in 1884. His father Joseph engineered an early canal on the Snake River and later became the first Mayor of Idaho Falls, Idaho in 1900. Clark attended the public schools and left Idaho Falls High School at age 15 and then attended school in Terre Haute, Indiana. Clark returned to Idaho Falls working as a mercantile clerk, then moved to Mackay, Idaho shortly after its founding and saved money to attend the University of Michigan Law School, but did not graduate but instead read law to enter the bar in 1904. He entered private practice in Mackay from 1904 to 1930. He was a Judge Advocate General for the State of Idaho from 1914 to 1915. Clark left to fight in 1916 in the Border War and then World War I. He served in a machine gun unit and achieved the rank of lieutenant in the United States Army. He was a member of the Idaho House of Representatives from 1913 to 1916. He returned to private practice in Idaho Falls from 1930 to 1940. He served in the Idaho Senate from 1933 to 1936. He was the Mayor of Idaho Falls from 1937 to 1938. He was the Governor of Idaho from 1941 to 1942.
 Links: a. Idaho b. Mexican Border War (1910–1919) c. Hadley, Indiana d. Mackay, Idaho

Ex Output:

b