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: Who was the manager for the Kansas City Royals when Travis hit two home runs against them? Passage:In late April 2016, Travis began taking part in extended spring training games. He was assigned to the Advanced-A Dunedin Blue Jays for rehab on May 13. On May 18, he was promoted to the Triple-A Buffalo Bisons to continue rehabbing. On May 25, Travis was activated off the disabled list by the Blue Jays and called up. He hit a walk-off infield single on May 28 to help the Blue Jays defeat the Boston Red Sox 10–9. On August 5, Travis hit two home runs in a game for the first time in his career. Leading off against the Kansas City Royals, Travis hit a solo home run to give the Blue Jays an early 1–0 lead. In the ninth inning, he hit another solo home run off Kelvin Herrera to lift Toronto to a 4–3 victory. On August 8, Travis hit his first career triple, which came as part of a four-hit game against the Tampa Bay Rays. Following a game on August 31, the Blue Jays optioned Travis to the Rookie-Advanced Bluefield Blue Jays. The move was made to allow Josh Thole to be re-signed and have postseason eligibility. As the Bluefield season would end on September 1, Travis could be immediately recalled by Toronto afterward, bypassing the ten-day waiting period. Travis was recalled by the Blue Jays on September 2. He finished the season hitting .300 with 11 home runs and 50 RBI in 101 games. Travis played in the Wild Card Game and the first game of the American League Division Series, but missed the remainder of the ALDS with a bone bruise in his right knee. He played in the first game of the Championship Series, but left in the fifth inning after reaggravating his knee injury. On October 15, Travis was removed from the ALCS roster due to injury, and replaced by Justin Smoak. In accordance with MLB rules, Travis was ruled ineligible to return for the postseason, ending his season. On November 18, he underwent right knee surgery to remove a small flap of cartilage, and was expected to be ready for spring training.
 Links: a. Kansas City Royals b. Kelvin Herrera c. 2016 American League Division Series d. Dunedin Blue Jays
Example Output: a

Example Input: Question: What current countries were part of the Ottoman Empire? Passage:Crimea: The Last Crusade is a panoramic history of the Crimean War of 1853–56. Drawing extensively from Russian, French and Ottoman as well as British archives, it combines military, diplomatic, political and cultural history, examining how the war left a lasting mark on the national consciousness of Britain, France, Russia and Turkey. Figes sets the war in the context of the Eastern Question, the diplomatic and political problems caused by the decay of the Ottoman Empire. In particular, he emphasises the importance of the religious struggle between Russia as the defender of the Orthodox and France as the protector of the Catholics in the Ottoman Empire. He frames the war within a longer history of religious conflict between Christians and Muslims in the Balkans, southern Russia and the Caucasus that continues to this day. Figes stresses the religious motive of the Tsar Nicholas I in his bold decision to go to war, arguing that Nicholas was swayed by the ideas of the Pan-Slavs to invade Moldavia and Wallachia and encourage Slav revolts against the Ottomans, despite his earlier adherence to the Legitimist principles of the Holy Alliance. He also shows how France and Britain were drawn into the war by popular ideas of Russophobia that swept across Europe in the wake of the Revolutions of 1830 and 1848. As one reviewer wrote, Figes shows "how the cold war of the Soviet era froze over fundamental fault lines that had opened up in the 19th century."
 Links: a. Crimean War b. Ottoman Empire c. Catholic Church d. Pan-Slavism
Example Output: b

Example Input: Question: In what locations did the Pope live for longer than 50 years? Passage:With the increasing chaos and disorder leading to the collapse of the Roman Empire in 476, the popes assumed more and more civil authority first in Rome and in the surrounding territories. Rome became the center of the Catholic Church and the capital city of the Papal States; consequently, a great number of churches, convents and other religious buildings were erected in the city, sometimes above the ruins of older pre-Christian sites of worship. Churches proliferated during the Renaissance, when the Rome's most notable churches were built (this includes St. Peter's basilica on the Vatican Hill (the largest church in the world) and the city cathedral of St. John at the Lateran. The Papacy established its residence first in the Lateran Palace, then in the Quirinal Palace. When Rome was annexed by force to the newly unified Kingdom of Italy In 1870, Pope Pius IX retired to the Vatican, proclaiming himself a prisoner of the Savoy monarchy and leading to decades of conflict between the neonate state and the Catholic Church. This was resolved in 1929, when the Lateran Treaty were signed in Rome, establishing the right for the Holy See to govern the Vatican City as an independent, sovereign state. The patron saints of Rome remain Saint Peter and Saint Paul (or, as they are collectively referred to in this context, "the most holy Saints Peter and Paul"), both celebrated on June 29.
 Links: a. Kingdom of Italy b. Lateran Palace c. Vatican City d. Sovereign state
Example Output:
b