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 universities combined to form the team Murrills played for in the 1976 Benson and Hedges cup? Passage:Murrills made his first-class debut for Cambridge University against Warwickshire. He made 34 further first-class appearances for Cambridge, the last of which came against Oxford University in 1976. In his 35 appearances for the university, he scored 900 runs at an average of 14.75, with a high score of 67. This score, which was one of three fifties he made, came against Surrey in 1976. He also appeared twice in first-class cricket for a combined Oxford and Cambridge Universities team, in 1974 against the touring Indians and in 1976 against the touring West Indians. His debut in List A cricket came for Cambridge University in the 1974 Benson and Hedges Cup against Kent, with him making three appearances in that season's competition. In the 1976 Benson and Hedges Cup he made four appearances for the Combined Universities.
 Links: a. Cambridge University Cricket Club b. Warwickshire County Cricket Club c. List A cricket d. British Universities cricket team

Ex Output:
d


Ex Input:
Question: Which of the three emperors who Ji served lived longest? Passage:Jiang Ji (died 18 May 249), courtesy name Zitong, was an official and military general of the state of Cao Wei during the Three Kingdoms period of China. Born in the late Eastern Han dynasty, Jiang Ji started his career as a low-level official in his native Yang Province before becoming a subordinate of Cao Cao, the warlord who controlled the central government towards the end of the Eastern Han dynasty. After the end of the Eastern Han dynasty, he served in the state of Cao Wei through the reigns of the first three emperors – Cao Pi, Cao Rui and Cao Fang – and held various appointments in the military before rising to Grand Commandant, one of the top positions in the central government. During his service in Wei, he was known for being candid in giving advice to the emperor on various issues, including consolidating power, halting labour-intensive construction projects, and officials' abuses of power. In February 249, he joined the regent Sima Yi in staging a successful coup d'état against his co-regent Cao Shuang, but died from illness a few months later.
 Links: a. Cao Pi b. Cao Shuang c. Courtesy name d. Incident at the Gaoping Tombs

Ex Output:
a


Ex Input:
Question: How long has Nakayama been president of Sega when he was looking for a flagship series to compete with Mario? Passage:In 1990, Sega president Hayao Nakayama sought a flagship series to compete with Nintendo's Mario franchise along with a character to serve as a company mascot. Several character designs were submitted as part of a contest. Among the designs was an egg-shaped man wearing pajamas who resembled Theodore Roosevelt, drawn by Naoto Ohshima. According to Ohshima, the resemblance to Roosevelt was unintentional, saying he was influenced by a variety of characters. Retrospective sources have indicated Ohshima based the character on Humpty Dumpty and Mario. The Roosevelt lookalike did not win the contest; rather, another Ohshima character, a hedgehog named Mr. Needlemouse—later renamed Sonic—prevailed. As development of the Sega Genesis game Sonic the Hedgehog progressed, however, programmer Yuji Naka and the rest of Sonic Team thought the rejected design was excellent and deserved inclusion in the game. Since the character could not be the protagonist, the team retooled him into the game's main antagonist.
 Links: a. Naoto Ohshima b. Hayao Nakayama c. Theodore Roosevelt d. Sonic the Hedgehog (character)

Ex Output:

b