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: Where did the Occupy movement begin? Passage:Occupy Melbourne was a social movement which took place from late 2011 to mid 2012 in Melbourne, Australia as part of the global Occupy movement. Participants expressed grievances concerning economic inequality, social injustice, corruption in the financial sector, corporate greed and the influence of companies and lobbyists on government. Protests began on 15 October 2011 in City Square with a 6-day-long protest encampment, from which people were forcibly evicted by Victoria Police at the request of the City of Melbourne CEO on 21 October 2011. From 2 November 2011, Occupy set up camp in Treasury Gardens before being moved on from that location in December. A significantly diminished number of protesters set up camp at Father Bob's church at his invitation until his retirement in January 2012. Physical manifestations of the movement had largely dissipated by mid-2012 though it adopted a strategy of decentralisation and became influential in the creation of new community networks, affinity groups and collectives.
 Links: a. Lobbying b. Occupy movement c. Bob Maguire d. City of Melbourne
Example Output: b

Example Input: Question: How many members did No. 11 Group have during the years of the Blitz? Passage: the Second World War, the station was very active during the Battle of Britain and the Blitz in 1940–41 in No. 12 Group (controlled from RAF Watnall in Nottingham) as it was the main fighter station for a lot of the southern East Midlands, and fighters from the station would often patrol as far as Birmingham. During the Battle of Britain many squadrons were rotated through Wittering to spells in the south of England with No. 11 Group that was bearing the brunt of the battle. With many of the Luftwaffe raids during the Blitz taking part at night, Wittering-based squadrons were instrumental in the development of night combat techniques. These included the use of the Turbinlite aircraft which replaced the nose with a powerful searchlight insulated in the nose of Havocs and Bostons. In April 1943 No. 141 Squadron were moved in, operating de Havilland Mosquitoes. 1943 also saw the station host 2 USAAF squadrons, albeit temporarily: 63 Fighter Squadron USAAF with its P47s operated from Wittering between January and March before moving to RAF Horsham St Faith; 55 Fighter Squadron operated its P38s and P51s from Wittering between August and March 1944 before moving to nearby RAF Kingscliffe.
 Links: a. No. 11 Group RAF b. Birmingham c. Birmingham d. 63rd Fighter Squadron
Example Output: a

Example Input: Question: What age was Canut VI the year he led a Danish expedition that destroyed Groswin burgh? Passage:Groswin took over the position of nearby Altes Lager Menzlin as a trade center after its decline in the 9th century. The tribal affiliation of the inhabitants, though associated with the greater tribe of the Veleti, is uncertain - while the Ukrani are reported to have dwelled south of the Zarow and the Rani north of the Ryck river, the name of the medieval inhabitants of the area between these rivers is not reported. The lands of Groswin became a castellany of the Duchy of Pomerania during the westward expansion of Wartislaw I in the 1120s, and became part of the Bishopric of Cammin in 1140. In 1153, Stolpe Abbey was founded in the Groswin castellany as the first Pomeranian monastery. A market at the Groswin burgh is documented in 1159. In 1185, a Danish expedition led by Canut VI destroyed the burgh and devastated the castellany. Though the name Groswin stayed in use to refer to the area, the position of the former burgh as the areas center was taken over by nearby Anklam.
 Links: a. Anklam b. Wartislaw I, Duke of Pomerania c. Stolpe Abbey d. Canute VI of Denmark
Example Output:
d