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: How many people lived in Milan when Diocletian restored political stability after the Crisis of the Third Century? Passage:During the Crisis of the Third Century the Roman Empire nearly collapsed under the combined pressures of invasions, military anarchy and civil wars, and hyperinflation. In 284, emperor Diocletian restored political stability. He carried out thorough administrative reforms to maintain order. He created the so-called Tetrarchy whereby the empire was ruled by two senior emperors called Augusti and two junior vice-emperors called Caesars. He decreased the size of the Roman provinces by doubling their number to reduce the power of the provincial governors. He grouped the provinces into several dioceses (Latin: diocesis) and put them under the supervision of the imperial vicarius (vice, deputy), who was the head of the diocese. During the Crisis of the Third Century the importance of Rome declined because the city was far from the troubled frontiers. Diocletian and his colleagues usually resided in four imperial seats. The Augusti, Diocletian and Maximian, who were responsible for the East and West respectively, established themselves at Nicomedia, in north-western Anatolia (closer to the Persian frontier in the east) and Milan, in northern Italy (closer to the European frontiers) respectively. The seats of the Caesars were Augusta Treverorum (on the River Rhine frontier) for Constantius Chlorus and Sirmium (on the River Danube frontier) for Galerius who also resided at Thessaloniki.
 Links: a. Milan b. Danube c. Sirmium d. History of Trier

Ex Output:
a


Ex Input:
Question: How many years did Nick Van Exel play for the Nuggets? Passage:The 1998–99 NBA season was the Nuggets' 23rd season in the National Basketball Association, and 32nd season as a franchise. During the offseason, the Nuggets acquired Nick Van Exel from the Los Angeles Lakers, and second-year guard Chauncey Billups from the Toronto Raptors. Despite the return of Antonio McDyess, who was re-signed by the team after one season with the Phoenix Suns, the Nuggets continued to struggle under new head coach Mike D'Antoni losing eight of their first nine games. Top draft pick Raef LaFrentz out of Kansas was out for the remainder of the season with a knee injury after playing just twelve games. The Nuggets finished the lockout shortened season sixth in the Midwest Division with a 14–36 record. This was also their final season playing at McNichols Sports Arena. Following the season, second-year forward Danny Fortson and Eric Williams were both traded to the Boston Celtics, and D'Antoni was fired as coach.
 Links: a. Nick Van Exel b. Raef LaFrentz c. 1997–98 Los Angeles Lakers season d. Antonio McDyess

Ex Output:
a


Ex Input:
Question: Who was the ruler of Egypt during the Israeli invasion into Lebanon? Passage:According to historians William Cleveland and Martin Bunton, Beirut became an international banking center because of its “laissez-faire economic system”. Business owners from Cairo, Damascus, and Baghdad moved to Beirut for economic opportunities. Despite Lebanon’s cultural liberalism and economic prosperity, sectarian tensions remained as citizens identified themselves through their sects. With Muslims calling for greater representation and with Cold War tensions, Lebanese leadership had to decide whether to ally with the West or with Egypt, Syria and its Arab history. Christians wanted to continue alliances with the West but Muslims were drawn to Nasser's pan-Arabism. Multiple factors including sectarian tensions and Palestinian refugee settlement in southern Lebanon contributed to the beginnings of the Lebanese Civil War. In 1976, Syrian President Hafez al-Assad sent troops into Lebanon to fight PLO forces on behalf of Christian militias. This led to escalated fighting until a cease-fire agreement later that year that allowed for the stationing of Syrian troops within Lebanon. The Syrian presence in Lebanon quickly changed sides; soon after they entered Lebanon they had flip-flopped and began to fight the Christian nationalists in Lebanon they allegedly entered the country to protect. The Kateab Party and the Lebanese Forces under Bachir Gemayel strongly resisted the Syrians in Lebanon. Following the Israeli invasion into Lebanon in 1982, new Lebanese President Amine Gemayel sought the support of Syrian troops to stabilize the region. Syria fought Israeli troops after the latter's invasion of Lebanon.
 Links: a. Lebanese Forces b. 1982 Lebanon War c. Egypt d. Beirut

Ex Output:

c