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: How many miles long is the river that Silvanus drove the Alamanni tribesmen back from? Passage:Silvanus was born in Gaul, the son of Bonitus, a Laetic Frankish general who had supported Constantine I in the civil war against Licinius. Like so many other Franks of his times, and like his father before him, he was a loyal and thoroughly romanized "barbarian" in the military service of the Empire. By AD 351, he held the rank of tribune and was one of the senior officers who defected to Emperor Constantius II at the Battle of Mursa Major, after initially supporting the usurper Magnentius. An able soldier, Silvanus was eventually promoted to the rank of Magister militum per Gallias, a crucial post, then in AD 352-353, Constantius personally entrusted him with the difficult task of driving the Alamanni tribesmen raiding and looting in Gaul back beyond the Rhine, and restoring the fast eroding Roman authority in the province. This Silvanus fulfilled partly by bribing the Alamanni chieftains with the taxes he had collected, partly by defeating the Alamanni in battle and partly by suppressing the local bagaudae insurrections flaring up again in central and northern Gaul.
Links: a. Bonitus (magister militum) b. Constantine the Great c. Rhine d. Rhine

Output: c

Input: Consider Input: Question: Did Daddario and Upton play the same role in the Layover? Passage:In 2016, the actress had a supporting role in the Nicholas Sparks romantic drama film The Choice, directed by Ross Katz. Daddario subsequently starred as one of the leads in the film adaptation of Baywatch (2017), reuniting with her San Andreas co-star Dwayne Johnson. She played Summer Quinn, who was portrayed by Nicole Eggert in the original television series. That same year, Daddario portrayed Kate Jeffries, alongside Kate Upton, in the road trip comedy The Layover (2017), directed by William H. Macy. In 2018, Daddario appeared in the music video "Wait" by Maroon 5 and starred as Avery Martin in the romantic comedy When We First Met, opposite the film's co-writer Adam DeVine. Daddario also appeared as a Scuba Diver in Rampage directed by Brad Peyton but was cut in the final film. Daddario starred as Constance Blackwood in We Have Always Lived in the Castle, a Stacie Passon-directed film adaptation of Shirley Jackson's mystery thriller novel of the same name. Daddario has been cast alongside Henry Cavill and Sir Ben Kingsley in the psychological thriller Night Hunter (originally titled Nomis), and is also headlining the drama-thriller film Lost Girls and Love Hotels. Daddario starred in and acted as executive producer for the romantic comedy Can You Keep a Secret?, based on the novel of the same name by Sophie Kinsella, and will be appearing in the film Happy Life.
Links: a. Kate Upton b. Night Hunter (2018 film) c. Henry Cavill d. Can You Keep a Secret? (film)

Output: a

Input: Consider Input: Question: How many teams did the manager of Shrewsbury Town in 1961 manage? Passage:Originally a winger, Baker joined Plymouth Argyle as a teenager in the early 1950s. He made his first team debut in October 1954, but appeared sporadically over the next three years, as he developed his game playing for the club's reserve team in the Plymouth & District, Devon Wednesday, and Football Combination Leagues. He became a first team regular in 1958, and played an important part in the club's Third Division title campaign a year later. After that success, Baker sustained a knee injury which eventually brought his career at Home Park to an end. He scored 17 goals in all competitions for the club and made 83 appearances. He joined Shrewsbury Town in 1961, who were under the management of Arthur Rowley. He played in the match where Rowley broke Dixie Dean's record for most goals scored in the Football League. After 5 goals in 52 appearances, Baker returned to South Wales in 1962 to play for Barry Town, where he finished his career playing in the Southern League.
Links: a. Midfielder b. Shrewsbury Town F.C. c. Southern Football League d. Arthur Rowley
Output: d