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 old was Waledynski when the autocephaly he requested was finally granted? Passage:The establishment of the church was undertaken after the Treaty of Riga left a large amount of territory previously under the control of the Russian Empire, as part of the Second Polish Republic. Eastern Orthodoxy was widespread in the Belarusian Western Belarus regions and the Ukrainian Volhynia. The loss of ecclesiastical link due to the persecution of the Russian Orthodox Church in the Soviet Union, left the regional clergy in a crisis moment, and in 1924, the Ecumenical Patriarchate took over establishing several autonomous churches on territories of the new states that were formerly wholly or partially part of the Russian Empire (Finland, the Baltic States, and Poland). Earlier, in January 1922, the Polish government had issued an order recognizing the Orthodox church and placing it under the authority of the state. At that time a Ukrainian, Yurii Yaroshevsky, was appointed Metropolitan and exarch by the patriarch of Moscow. When Yaroshevsky began to reject the authority of Moscow Patriarchate, he was assassinated by a Russian monk. Nonetheless, his successor, Dionizy Waledynski (Dionisii Valedinsky), continued to work for the autocephaly of the Polish Orthodox church, which was finally granted by the Ecumenical Patriarch of Constantinople in his Tomos of 13 November 1924. Given that most of the parishioners were Ukrainians and Belarusians living in the Eastern areas of the newly independent Polish Second Republic, the Patriarch of Constantinople had a canonical basis to grant the Tomos to the Polish church as a successor of the Kyiv Metropolia, the former territory of Kyivan Rus' which Constantinople continued to see as its canonical territory (despite having agreed to allow Moscow to be its caretaker it in 1686). The Russian Orthodox Church at the time did not recognise the Polish autocephaly, as it did not recognise the autocephaly of the Orthodox Church of the Czech Lands and Slovakia.
Links: a. Second Polish Republic b. 2018 MoscowConstantinople schism c. Ecumenical Patriarchate of Constantinople d. Dionizy (Waledynski)
Example Output: d

Example Input: Question: How long had Darrell Royal been working as a head coach the year he learned about the wishbone offense? Passage:In 1968, Texas head coach Darrell Royal and his offensive coordinator Emory Bellard introduced what would become known as the wishbone offense. The wishbone was derived from the Split-T offense run at Oklahoma under Bud Wilkinson. In the formation, the quarterback lines up with a fullback and two tailbacks behind him, and on any play may keep the ball, hand off to the fullback, or pitch to a tailback. From the time Bryant arrived at Alabama through the 1970 season, the Crimson Tide ran a pro-style offense. By 1969, Bryant began to recruit larger linemen and tailbacks, and after a pair of six win seasons in 1969 and 1970, Bryant saw the success of the wishbone for the Longhorns and decided to implement the offense for the 1971 season. In spring 1971, Alabama assistants Mal Moore and Jimmy Sharpe traveled to Austin where they saw first hand how the wishbone operated during Texas' final week of spring practice.
Links: a. Darrell Royal b. Wishbone formation c. Bud Wilkinson d. Emory Bellard
Example Output: a

Example Input: Question: Which of the featured film actors was older when Loving premiered? Passage:Loving premiered on June 26, 1983 as a two-hour primetime movie. It starred much of the original cast and featured film actors Lloyd Bridges and Geraldine Page. Set in the fictional town of Corinth, Pennsylvania, the early years of the show revolved around the blue-collar Donovans and the blue-blood Aldens. Major social issues such as incest, alcoholism, and post-traumatic stress syndrome of Vietnam veterans were covered. But Marland and Nixon left the series after a few years and in spite of ABC's bumping down Ryan's Hope to give Loving a choice timeslot, and cast additions of such popular All My Children stars as Debbi Morgan and Jean LeClerc, the ratings remained low throughout the show's run. Loving suffered from a constant revolving door of writers and producers, leading to questionable story moments such as a heroine's addiction to cough syrup and one character's selling his soul to the Devil. Circumstances became so desperate in the early 1990s that, to keep the show afloat, ABC assigned its own programming suits, network executive Haidee Granger and later, Vice President of Daytime Programming JoAnn Emmerich, to serve as executive producers. Despite its frequently subpar ratings, on June 26, 1993, Loving celebrated its 10th Anniversary on ABC.
Links: a. Lloyd Bridges b. Lloyd Bridges c. Haidee Granger d. All My Children
Example Output:
a