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 group was organized the earliest, the 1st King's Dragoon Guards or the 2nd Dragoon Guards (Queen's Bays)? Passage:The 1st King's Dragoon Guards was a cavalry regiment in the British Army. The regiment was raised by Sir John Lanier in 1685 as the 2nd Queen's Regiment of Horse, named in honour of Queen Mary, consort of King James II. It was renamed the 2nd King's Own Regiment of Horse in 1714 in honour of George I. The regiment attained the title 1st King's Dragoon Guards in 1751. The regiment served as horse cavalry until 1937 when it was mechanised with light tanks. The regiment became part of the Royal Armoured Corps in 1939. After service in the First World War and the Second World War, the regiment amalgamated with the 2nd Dragoon Guards (Queen's Bays) in 1959 to form the 1st The Queen's Dragoon Guards.
 Links: a. British Army b. 1st The Queen's Dragoon Guards c. 2nd Dragoon Guards (Queen's Bays) d. British Army
Example Output: c

Example Input: Question: Are the well-known jazz and classical pianists that the quartet worked with both men? Passage:The Annex String Quartet, also known as The Annex Quartet, is a string quartet founded by violist Yunior Lopez in 2008 in Toronto, Ontario, Canada. Named after The Annex neighbourhood in downtown Toronto, the quartet began performing regularly in Toronto's many bars, coffee shops, and non-classical venues like Aroma Espresso Bar and the St. Lawrence Market. In 2010, they made their American debut alongside the Kronos Quartet at Carnegie Hall, and have since appeared in over 100 performances, recordings, and broadcasts. To date, the group's primary focus has been bridging the gap between classical and world music, which has led them to become one of the most eclectic performing ensembles in North America. They have performed, recorded, and ventured into various musical styles, and continue to work with a diverse range of artists including classical pianist, Jan Lisiecki, Cuban jazz pianist, Hilario Duran, and Canadian jazz icon, Jane Bunnett. Following multiple recording collaborations with a diverse range of artists, The Annex Quartet released their official debut album, The Roaring Twenties, in June 2013. The quartet's current work in progress is an all-Cuban album featuring famed Cuban Bolero singer, Anais Abreu. They are currently the ensemble-in-residence at Midtown Music School in Toronto and The Stratford Summer Music Festival in Stratford, Ontario.
 Links: a. Jan Lisiecki b. String quartet c. Jan Lisiecki d. Kronos Quartet
Example Output: a

Example Input: Question: What was the total cost of The Nelson Monument overlooking Portsmouth and The Nelson Monument on Glasgow Green? Passage:Nelson became – and remains – Britain's greatest naval war hero, and an inspiration to the Royal Navy, yet his unorthodox tactics were seldom emulated by later generations. The first monument to be erected in Britain to commemorate Nelson may be that raised on Glasgow Green in 1806, albeit possibly preceded by a monument at Taynuilt, near Oban in Scotland dated 1805, both also commemorating the many Scots crew and captains at the battle. The Nelson Monument on Glasgow Green was designed by David Hamilton and paid for by public subscription. Around the base are the names of his major victories: Aboukir (1798), Copenhagen (1801) and Trafalgar (1805). The Nelson Monument overlooking Portsmouth was built in 1807–08 with money subscribed by sailors and marines who served at Trafalgar. In 1808, Nelson's Pillar was erected by leading members of the Anglo-Irish aristocracy in Dublin to commemorate Nelson and his achievements (between 10% and 20% of the sailors at Trafalgar had been from Ireland), and remained until it was destroyed in a bombing by "Old IRA" members in 1966. Nelson's Monument in Edinburgh was built between 1807 and 1815 in the form of an upturned telescope, and in 1853 a time ball was added which still drops at noon GMT to give a time signal to ships in Leith and the Firth of Forth. In summer this coincides with the one o'clock gun being fired. The Britannia Monument in Great Yarmouth was raised by 1819. Nelson's Column, Montreal began public subscriptions soon after news of the victory at Trafalgar arrived; the column was completed in the autumn of 1809 and still stands in Place Jacques Cartier.
 Links: a. Nelson Monument, Edinburgh b. Nelson Monument, Portsdown Hill c. Nelson's Column, Montreal d. Nelson Monument, Portsdown Hill
Example Output:
b