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: Which of the regiments that Ellwood served in was the largest? Passage:Ellwood graduated from Duntroon in 1990 and was commissioned into the Royal Australian Infantry Corps. His early career included postings as a platoon commander in the 2nd/4th Battalion, Royal Australian Regiment and as an instructor in field training and tactics at Duntroon, before he was seconded to the British Army from 1998 for a two-year exchange with the Irish Guards, then stationed in Germany. During the secondment he deployed as part of the NATO intervention in the Kosovo War in 1999, serving as second-in-command of an armoured infantry company in the King's Royal Hussars Battle Group. For his service in Kosovo, Ellwood was awarded a Commander British Forces Commendation. He returned to Australia as a company commander and operations officer in the 5th/7th Battalion, Royal Australian Regiment (5/7RAR). Ellwood commanded B Company on operations in East Timor from October 1999 to April 2000, when 5/7RAR deployed with the International Force East Timor.
 Links: a. 2nd/4th Battalion, Royal Australian Regiment b. Kosovo War c. 2nd/4th Battalion, Royal Australian Regiment d. King's Royal Hussars

Output: a


Input: Consider Input: Question: How many soldiers were killed in the battle that Philippe de Mézières was knighted after? Passage:Philippe belonged to the poorer nobility. At first, he served under Luchino Visconti in Lombardy but within a year he entered the service of the husband of Joanna I of Naples, Andrew, Duke of Calabria, who was the son of the King Charles I of Hungary. Andrew was assassinated very soon in September 1345. In the autumn of that year, Philippe set out for the East in the French army. After the Battle of Smyrna in 1346 he was made a knight, and when the French army was disbanded, he made his way to Jerusalem. He realized the advantage which the discipline of the Saracens gave them over the disorderly armies of the West, and conceived the idea of a new order of knighthood, but his efforts proved fruitless. The first sketch of the order was drawn up by him in his Nova religio passionis (1367–1368; revised and enlarged in 1386 and 1396). From Jerusalem he found his way in 1347 to Cyprus to the court of Hugh IV, where he found a kindred enthusiast in the king's son, Peter of Lusignan, then count of Tripoli; but he soon left Cyprus, and had resumed his career as a soldier of fortune when the accession of Peter to the throne of Cyprus (Nov. 1358) and his recognition as king of Jerusalem induced Philippe to return to the island, probably in 1360, when he became chancellor.
 Links: a. Peter I of Cyprus b. Luchino Visconti (died 1349) c. Smyrniote crusades d. Cyprus

Output: c


Input: Consider Input: Question: Was the club Dudgeon signed with in June of 2007 in existence in the year 1900? Passage:Dudgeon was signed by Stalybridge Celtic on 26 June 2007. On 26 November 2007, he joined Northern Premier League Premier Division side Gateshead on a one-month loan. This loan was extended for another three months in December. However, he joined Gainsborough Trinity of the Conference North on a one-and-a-half-year contract in January 2008. In October, he joined Northern Premier League Premier Division club Worksop Town on a one-month loan, debuting in the 0–0 draw at Kendal Town on 11 October 2008. He joined Newcastle Blue Star in the Northern Premier League Division One North on a one-and-a-half-year contract in November, before suffering a dislocated shoulder just 20 minutes into his debut in the 1–0 home defeat to Curzon Ashton on 15 November 2008. He made his final appearance for the club in the 3–1 home defeat to Trafford on 31 January 2009 before being released and joining Wakefield. He had an unhappy debut for the club, being sent-off for dissent following the award of a late penalty in the 3–2 defeat at Colwyn Bay on 14 February, before scoring his first goal for the club coming in a 2–1 victory at Salford City on 21 February.
 Links: a. Stalybridge Celtic F.C. b. Curzon Ashton F.C. c. Northern Premier League d. Northern Premier League


Output: a