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.

Ex Input:
Question: Who did Vinny Del Negro play for before he signed with the Spurs? Passage:The 199293 NBA season was the Spurs' 17th season in the National Basketball Association, and 26th season as a franchise. During the offseason, Terry Cummings suffered a serious knee injury and only played in the final eight games of the season. With the acquisition of Dale Ellis from the Milwaukee Bucks and signing free agent Vinny Del Negro, plus re-signing Avery Johnson after a brief stint with the Houston Rockets, the Spurs struggled with a 911 start to the season as new head coach Jerry Tarkanian was fired. After playing one game under Rex Hughes, the team hired John Lucas II as their new coach. At midseason, they acquired J.R. Reid from the Charlotte Hornets. Under Lucas, the Spurs would play solid basketball posting a 10-game winning streak in January, then winning eight straight in February, finishing second in the Midwest Division with a 4933 record. David Robinson and Sean Elliott were both selected for the 1993 NBA All-Star Game.
Links: a. Jerry Tarkanian b. Vinny Del Negro c. Vinny Del Negro d. John Lucas II

Ex Output:
b

Ex Input:
Question: Are the two canals which were built in 1914 and 1930, and which are located in parallel to the Lippe, of equal length to each other? Passage:Historically, the preconditions for a change of the landscape started with the construction of the Cologne-Minden trunk line in the 1840s that connected the river Rhine settlements like Cologne with harbours and trade at the river Weser and so with the Lippe town Hamm, too. Moreover, this railway supported the coal and steel industry development in the northern Ruhr region. The hard coal mining that started in the middle of the 19th century in the Emscher catchment area developed in the following decades direction north and so to the Lippe catchment area, too, where from the 1860s on first problems from mining subsidence and drainage of polluted water appeared. The historical city of Hamm and the towns Lunen, Haltern and Dorsten were small settlements located at the Lippe but expanded with the establishing of hard coal mines starting around 1900. The industrialization caused huge water quality problems in the Lippe tributaries and the Lippe itself; therefore first in 1913 the Sesekegenossenschaft and later in 1926 the Lippeverband as water boards ("Wasserwirtschaftsverbande") were established. Since 1914 the Datteln-Hamm Canal and 1930 the Wesel-Datteln Canal are located in parallel to the Lippe which is not navigable for mass transportation. The canals receive Lippe water or feed the Lippe (to improve dry weather flow) from an exchange facility in Hamm, operated by the Wasserverband Westdeutsche Kanale.
Links: a. Cologne-Minden trunk line b. Wasserverband Westdeutsche Kanale c. Datteln-Hamm Canal d. Weser

Ex Output:
c

Ex Input:
Question: What was the Hertford Town club record the year that Scott Neilson joined? Passage:Neilson was a member of Norwich City's youth teams at the age of 11, went on to Charlton Athletic and also won schoolboy honours for Wales. His senior career started at his brother Tony's club Hertford Town of the Isthmian League in 2005. He was top goalscorer for the reserves when he made his debut on 25 October in an Isthmian League Associate Members Trophy game against Clapton, before going on to play 15 games in his first season and scoring one goal. In his second season, he played 24 games upping his goal tally by another nine, before he earned a move in December 2006 to Ware a second club where his brother also played. In one game in January 2008, Neilson came off the bench to score four goals for Ware against Tilbury in a 52 victory. The goals went towards Neilson's total of 23 from 40 games for Ware in the Isthmian League First Division North, helping Ware towards the end-of-season play-offs. However, he left Ware before the end of the season to join Cambridge City in March 2008 for the rest of the club's Conference South campaign.
Links: a. Hertford Town F.C. b. Cambridge City F.C. c. Isthmian League d. Clapton F.C.

Ex Output:
a