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 the Jedburgh Railway only serve Jedburgh? Passage:The Waverley Route spawned a series of branches serving the towns and villages in the Scottish Borders: a branch line from Kelso Junction near reached Kelso where it met an NER branch from . The NBR Chairman, Richard Hodgson, sought to link the Waverley Route with the Edinburgh-Berwick line between Ravenswood Junction, north of St Boswells, and ; the branch between Reston and Duns had been completed in 1849 and a western section to St Boswells was promoted as the Berwickshire Railway. It opened throughout on 2 October 1865. Other towns to be connected were Jedburgh by the independent Jedburgh Railway which was inaugurated on 17 July 1856 and worked by the NBR, and Selkirk via the Selkirk and Galashiels Railway, also opened in 1856 and operated by the NBR, while Langholm received a branch from , and Gretna one from . One of the last branches to be constructed was the Lauder Light Railway in 1901; this replaced an omnibus subsidised by the NBR providing access from the town of Lauder, famed for its trout, and connecting with trains at .
Links: a. Langholm b. Lauder Light Railway c. Lauder d. Jedburgh Railway
Example Output: d

Example Input: Question: How old was Arrigo Sacchi when Carbone moved to Milan? Passage:Carbone had a much travelled career, playing for ten different clubs. He began his youth career with Bari, making his professional debut with the club in Serie B during the 198889 season, earning promotion to Serie A. During his first season in Serie A, he broke into the starting line-up, making 26 appearances and scoring a goal against Inter at the San Siro stadium. In 1990, he moved to Milan at the request of manager Arrigo Sacchi. During his first season with the club, he made 21 appearances in Serie A, making his club debut on 9 September 1990, in a 10 home win over Genoa in Serie A. He also made his UEFA Champions League debut, scoring a goal against Club Bruges, and he started in Milan's European Supercup and Intercontinental Cup victories in 1990.
Links: a. Genoa C.F.C. b. Arrigo Sacchi c. A.C. Milan d. Genoa C.F.C.
Example Output: b

Example Input: Question: How many books did V. Gordon Childe write? Passage:Labor won the 1920 election with a majority of one and Storey became Premier. His thin majority, combined with a substantial minority in Legislative Council (made up of life appointees) and attacks of nephritis made his job hard. His private secretary at this time was V. Gordon Childe, later internationally famous in the field of archaeology, who wrote the book How Labor Governs, based on his experience as Storey's secretary. In June 1920, he appointed Judge Norman Ewing to carry out a royal commission in to the imprisonment of twelve IWW members in 1916 for treason, arson, sedition and forgery. On Ewing's recommendation, ten were released in August. In early 1921, he prorogued Parliament to prevent his Government being overthrown during a six months absence to visit financiers and a Harley Street doctor in London. Despite the warnings of his doctor, he undertook heavy work in London and on his return to Sydney in July.
Links: a. Forgery b. V. Gordon Childe c. V. Gordon Childe d. Archaeology
Example Output:
b