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: What was the real name of the wrestler Buffalo defeated in order to win his first title in Osaka Pro? Passage:In April 1999, Yamada joined the Osaka Pro Wrestling promotion, where he began wrestling under a mask as Black Buffalo, a character inspired by the Osaka Kintetsu Buffaloes baseball team. He made his debut for the promotion at its first event on April 29, where he, Dick Togo and Violencia, forming the villainous alliance Legion of Violence (LOV), were defeated in a six-man tag team main event by Masato Yakushiji, Naohiro Hoshikawa and Super Delfin. Buffalo kept teaming with Togo for the rest of the year. On November 21, Buffalo won his first title in Osaka Pro, when he defeated Super Delfin for the UWF Super Welterweight Championship, only to lose it back to him seven days later. In early 2000, LOV was joined by Daio Quallt and Policeme~n, replacing Violencia. On May 1, Buffalo and Togo defeated Super Delfin and Super Demekin in the finals to win the 1st Anniversary Tag Tournament. In September, Buffalo took part in the inaugural Tenno-zan tournament, where he made it to the semifinals, before being eliminated by Super Delfin. After Dick Togo left Osaka Pro at the end of 2000, LOV was disbanded and replaced by the new group, FLUXxx, as a member of which Buffalo formed a new tag team named Infinity with Tsubasa. After reaching the semifinals of the 2001 Osaka Tag Festival, Buffalo and Tsubasa defeated Super Delfin and Takehiro Murahama on July 21 to win the vacant Osaka Pro Wrestling Tag Team Championship. They would lose the title to Murahama and Kaiju Zeta Mandora on August 24. The following October's Tenno-zan saw a repeat of the previous year's tournament as Buffalo was eliminated in the semifinals by Super Delfin. On January 27, 2002, Buffalo, Tsubasa and Gamma defeated Super Delfin, Super Demekin and Takehiro Murahama to win the Trios Cup Tournament. On August 25, Buffalo and Tsubasa regained the Osaka Pro Wrestling Tag Team Championship by defeating the Kishiwada Gurentai (Big Boss MA-G-MA and Daio Quallt). After a five-month reign, they would lose the title to Jyushin Thunder Liger and Takehiro Murahama on February 1, 2003.
 Links: a. Magnitude Kishiwada b. Super Delfin c. Super Delfin d. Super Delfin
Example Output: b

Example Input: Question: How many years after the Clairvaux was found, was the Margam Abbey founded? Passage:The abbey was founded in 1147 as a daughter house of Clairvaux by Robert, Earl of Gloucester, and was dedicated to the Blessed Virgin Mary. Early Christian crosses found in the close vicinity and conserved in the nearby Margam Stones Museum suggest the existence of an earlier Celtic monastic community. The founding abbot was William of Clairvaux. The third abbot, Conan, enjoyed the praise of Giraldus Cambrensis, whom he appears to have entertained prior to his official visit with Baldwin of Forde, Archbishop of Canterbury, to preach the Crusade in 1188. Conan (or Cunan) contributed to Patristic literature, as he is credited with the capitula or chapter-headings prefixing each section of St. Bernard's Sermons on the Song of Songs, one of the works for which that author was titled a Doctor of the Church.
 Links: a. Clairvaux Abbey b. Clairvaux Abbey c. Pilcrow d. Pilcrow
Example Output: a

Example Input: Question: How old is the person who wrote Dreamlover? Passage:A day following its impact on US radio stations, "Shake It Off" gained an audience of nine million. The song debuted at 45 on the Billboard Radio Songs chart with 29 million in all-format audience. It debuted on the Mainstream Top 40 chart at number 12, tying it with Mariah Carey's "Dreamlover" (1993) as the highest chart debut. "Shake It Off" became her third number-one song there, following her 2008 country crossover hit single "Love Story" and her 2013 hit "I Knew You Were Trouble", which remained No. 1 for seven consecutive weeks. The single debuted at number nine on the Billboard Adult Top 40 chart, becoming the highest debut single on the chart. On its sixth week, the song became her second No. 1 on the Adult Top 40 chart since her 2013 hit "I Knew You Were Trouble", tying it with Celine Dion's "Because You Loved Me" (1996) as the fastest song to reach number 1 in just six weeks. The song debuted at number 58 on the Country Airplay chart, though only two country stations played the song more than four times. It spent only one week on the chart. Billboard noted that its presence on the chart was unusual due to its sound and Swift's acknowledged transition from country to pop music. On the Radio Songs chart, the song became Swift's third number-one song there, following her 2013 hit "I Knew You Were Trouble". "Shake It Off" has spent four non-consecutive weeks at No. 1 on the Digital Songs chart.
 Links: a. Hot 100 Airplay (Radio Songs) b. Adult Top 40 c. Love Story (Taylor Swift song) d. Mariah Carey
Example Output:
d