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: In what Kentucky county did Robert Mallory die? Passage:Born in Madison Court House, Virginia, Mallory attended private schools and graduated from the University of Virginia in 1827. He engaged in agricultural pursuits in La Grange, Kentucky, studied law and was admitted to the bar in 1837, commencing practice in New Castle, Kentucky. He was elected an Opposition and later Unionist to the United States House of Representatives in 1858, serving from 1859 to 1865, being unsuccessful for reelection in 1864. There, Mallory served as chairman of the Committee on Roads and Canals from 1859 to 1863. He was a delegate to the National Union Convention in 1866 and was one of the vice presidents of the Centennial Exposition in 1876. He resumed agricultural pursuits until his death near La Grange, Kentucky on August 11, 1885. He was interred in Spring Hill Family Cemetery in Ballardsville, Kentucky.
 Links: a. Centennial Exposition b. 1866 National Union Convention c. La Grange, Kentucky d. Centennial Exposition
Example Output: c

Example Input: Question: What country is the Bristol Channel located in? Passage:Because of the natural layout of the harbour, Ilfracombe became a significant safe port (registered port of refuge) on the Bristol Channel. It also had trade routes between Kinsale and Tenby, which made the port stronger. In 1208 it was listed as having provided King John with ships and men to invade Ireland; in 1247 it supplied a ship to the fleet that was sent to conquer the Western Isles of Scotland; 6 ships, with 79 men were sent to support the siege of Calais. Ilfracombe was the last disembarkation point for two large forces sent to subdue the Irish. The building which sits on Lantern Hill by the harbour, known as St Nicholas's Chapel (built 1361) is reputed to be the oldest working lighthouse in the UK; a light/beacon has been there for over 650 years. The town was also home to the Bowen family. James Bowen was master of HMS Queen Charlotte, the flagship of Richard, Earl Howe at the 1794 "Glorious First of June" battle. James Bowen was commissioned by Howe for his leadership in the battle, he rose through the levels - commander of the Argot, the Dreadnought, and in Georgian England titled "defender of Madeira", led the fleet which rescued the British army at Corunna in the Peninsula war, and retired as a Rear Admiral, Commissioner of the Royal Navy. Captain Richard Bowen (1761–1797) James Bowen's younger brother, a British naval commander on the ship HMS Terpsichore, served under Lord Nelson, and was killed at the battle of Santa Cruz de Tenerife. John Bowen (1780–1827), son of James Bowen, a naval officer and colonial administrator founded the first settlement of Tasmania at Risdon Cove in 1803 - the settlement which later became known as Hobart. Lieutenant A E Down, was initially posted to Ilfracombe to lead a protection ship for the customs and excise, he married a local girl, rose through the levels to retire as vice Admiral, his son joined the navy aged 14 (his first navy kit is on display at National Maritime Museum Greenwich). In 1802 James Meek married Down's daughter and settled in the town, James Meek was appointed the Comptroller of Victuals to the Royal Navy in 1832, he was knighted, and died in Ilfracombe 1852. (gentlemen's gazette)
 Links: a. Richard Bowen (Royal Navy) b. Calais c. Bristol Channel d. Calais
Example Output: c

Example Input: Question: Was Ertegun born in the Ottoman Empire? Passage:Born in Constantinople to a civil servant father, Mehmet Cemil Bey, and a mother Ayşe Hamide Hanım, who was a daughter of Sufi shaykh İbrahim Edhem Efendi, he studied law at Darülfünûn-u Şahâne (دار الفنون شهانه), now Istanbul University, and graduated in 1908. He was a legal counsel for the Ottoman Ministry of Foreign Affairs, when he saw the birth of his first son, Nesuhi, on 26 November 1917, in Constantinople (now Istanbul), during the First World War. Taking part in an Ottoman delegation with a mission to search reconciliation with the Nationalists in Ankara, by the end of 1920, changed his destiny. While the two Ottoman Ministers heading the delegation returned to Istanbul after not achieving an understanding with the revolutionaries led by Mustafa Kemal Pasha he chose to join the National Struggle and remained in Ankara, leaving behind his young wife and three-year-old son, Nesuhi. He became an aide to Mustafa Kemal during the Turkish War of Independence and the chief legal counsel of the Turkish delegation to the resulting Treaty of Lausanne in 1923.
 Links: a. Bey b. Turkish War of Independence c. Turkish War of Independence d. Istanbul
Example Output:
d