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.

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
c

Question: How many year does the person who appoints governors in India serve per term? Passage:In the Republic of India, a governor is the constitutional head of each of the twenty-eight states. The governor is appointed by the President of India for a term of five years, and holds office at the President's pleasure. The governor is de jure head of the state government; all its executive actions are taken in the governor's name. However, the governor must act on the advice of the popularly elected council of ministers, headed by the chief minister, which thus holds de facto executive authority at the state-level. The Constitution of India also empowers the governor to act upon his or her own discretion, such as the ability to appoint or dismiss a ministry, recommend President's rule, or reserve bills for the President's assent. Over the years, the exercise of these discretionary powers have given rise to conflict between the elected chief minister and the union government–appointed governor.
 Links: a. Government of India b. President of India c. Ministry (collective executive) d. Constitution of India
b

Question: Who was the head coach of the Pirates in 1992? Passage:After a short stint in Scranton to start 1991, Morandini returned to the major leagues for the remainder of his career. He amassed four triples and thirteen stolen bases in his first full season, highlighting his speed. The following season produced one of the most memorable moments of Morandini's career. In a game against the Pittsburgh Pirates on September 20, 1992, he turned an unassisted triple play. In the sixth inning, Morandini caught a line drive off of the bat of Jeff King, touched second base to put out Andy Van Slyke, and tagged out Barry Bonds coming from first base; the Pirates went on to win the game, 3–2, in extra innings. It was the first unassisted triple play since 1968, and the first in the National League since 1927. Morandini was also the first second baseman in National League history, and the first in the regular season, to turn an unassisted triple play; all previous occurrences were made by first basemen or shortstops. The only other second baseman to achieve the feat prior was Bill Wambsganss, who turned a triple play in the 1920 World Series.
 Links: a. Major League Baseball schedule b. Major League Baseball schedule c. Bill Wambsganss d. Pittsburgh Pirates

d