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: How big was the Royal Air Force the year York joined Aston Villa? Passage:York started his career with Handsworth Royal, Birchfield Rangers and the Royal Air Force, and also guested for Chelsea during World War I. In March 1915 he joined Aston Villa as an amateur, signing professional forms in August 1919. He scored one goal in 17 games in 191920, but did not feature in the 1920 FA Cup Final, which ended in a 10 victory over Huddersfield Town at Stamford Bridge. He appeared just 11 times in 192021, before going on to make 47 appearances in the 192122 campaign, as the "Villans" finished fifth in the First Division. He scored nine goals in 37 games in 192223 and five goals in 43 games in 192324. He also appeared at Wembley in the 1924 FA Cup Final, in a 20 defeat to Newcastle United. He scored seven goals in 34 matches in 192425, before hitting 20 goals in 44 appearances in 192526. He bagged 13 goals in 43 games in 192627, before being limited to just four goals in 30 appearances in 192728. He rediscovered his scoring form with 18 strikes in 48 matches in 192829, before hitting seven goals in 32 games in 192930. However he played just four times in the 193031 campaign, as Villa finished second in the league with an English record of 128 top-flight league goals scored.
Links: a. 192324 Football League b. Royal Air Force c. Huddersfield Town A.F.C. d. Royal Air Force
Example Output: b

Example Input: Question: Are both football clubs that Hill's team played in the 2002-03 season FA Cup located in England? Passage:He led the club to the Isthmian League title and promotion to the Conference in his first season in charge. The following season, Hill's side finished third in the Conference and took Premiership Charlton Athletic to a replay in the Third Round of the FA Cup. They again reached the FA Cup Third Round in the 2001-02 season, losing 4-1 to Ipswich Town after taking the lead, and finished second in the Conference, missing promotion to the Football League on goal difference. The following season saw another run in the FA Cup, beating Plymouth Argyle after a replay in the Third Round before losing 1-0 to Norwich City thanks to an injury time goal. Their league form was not particularly good until the latter stages of the season when they won eleven consecutive games and qualified for the play-off final, losing 3-2 in extra-time to Doncaster Rovers. The 2003-04 season was not a success and Hill resigned soon after a 9-0 defeat at home to Hereford United late in the season.
Links: a. Doncaster Rovers F.C. b. Charlton Athletic F.C. c. Plymouth Argyle F.C. d. Isthmian League
Example Output: c

Example Input: Question: What years did the Prince-Bishop of Basel reign? Passage:The Vorem Holz 3 archeological site contains the remains of a Bronze Age settlement in the Pieterlen municipality. A first- to third-century Roman estate has also been discovered. During the Middle Ages there were several settlements in the modern municipal borders. A medieval bath house was found at Thurliweg. The early medieval Totenweg cemetery served two different settlements during the 7th-8th centuries. A medieval fortification at Grauschenhubel has also been discovered. During the Late Middle Ages the village was mentioned as the personal property of the Lords of Pieterlan. By the end of the 13th century, the village passed through the hands of a number of nobles before ending up under the Prince-Bishop of Basel. Under the Prince-Bishops the village was combined with Romont, Reiben (now part of Buren an der Aare and Meinisberg) to form the southern-most ecclesiastical district of the Erguel seigniory. The low court met in Pieterlen while the high court was in Reiben and was held on the bridge over the Aare river. Militarily it was part of the banner of Biel.
Links: a. Prince-Bishopric of Basel b. Early Middle Ages c. Biel/Bienne d. Romont, Bern
Example Output:
a