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 goals did Ryan McGuffie have for Gretna? Passage:He began his career at Rangers, where he made 2 appearances. Walker made his senior league debut in a 10 win over Motherwell at Fir Park, coming off the bench to replace Hamed Namouchi. Walker had a six-month loan spell at Clyde in which he made his Bully Wee debut in a 10 victory at Broadwood Stadium against Ross County. During this time, Walker won the SFL young player of the month award for September 2004. After his short-term deal at Broadwood, Walker went to Sweden for a couple of months but decided to come back home. he joined Morton in July 2005. Walker made his Morton debut in a 32 (AET) Challenge Cup win over Gretna, in which assistant boss at Morton, Derek Collins, and later-to-be teammate Ryan McGuffie played for the opposition. His senior league debut was the following week against Raith Rovers, in which Morton triumphed 20 in front of 3,222 fans. He signed a new contract in May 2009, for another year at Morton. Being out of contract in the summer, and struggling for fitness, Walker was loaned to Brechin City for three months in January 2010. Walker suffered a recurrence of a groin injury, where he underwent surgery but remained at Brechin until April. He was released at the end of the 200910 season. After his release from Morton, Walker decided to go part-time and was signed up by ex-manager Jim McInally at East Stirlingshire for the 201011 season.
Links: a. Jim McInally b. Derek Collins c. Ryan McGuffie d. Ross County F.C.

Ex Output:
c

Ex Input:
Question: Was his mother still alive when Benigno Simeon Aquino III took the oath? Passage:By tradition, it is also the chief justice who swears into office the President of the Philippines. One notable deviation from that tradition came in 1986, and later again in 2010. Due to the exceptional political circumstances culminating in the People Power Revolution, on February 25, 1986, Corazon Aquino took her oath of office as President before then Associate Justice Claudio Teehankee in San Juan just minutes before Ferdinand Marcos took his own oath of office also as President before Chief Justice Ramon Aquino. Marcos fled into exile later that night. More than two decades afterwards, Benigno Simeon Aquino III followed in his mother's footsteps (with almost similar reasons) by having then Associate Justice Conchita Carpio-Morales to administer his oath of office, rather than then Chief Justice Renato Corona (who was eventually impeached halfway through Aquino's term). Six years later, in 2016, Rodrigo Duterte took his oath of office before Associate Justice Bienvenido Reyes, his classmate at San Beda College of Law, instead of Chief Justice Maria Lourdes Sereno (who would eventually be removed thru quo warranto after it was determined that she had been unlawfully holding office ab initio).
Links: a. Ferdinand Marcos b. Corazon Aquino c. Rodrigo Duterte d. Corazon Aquino

Ex Output:
b

Ex Input:
Question: Is the king who conquered England older than his half-brother who he granted the Studland? Passage:The first records of inhabitants on Brownsea Island occurred in the 9th century, when a small chapel and hermitage were built by monks from Cerne Abbey near Dorchester. The chapel was dedicated to St Andrew and the only resident of the island was a hermit, who may have administered to the spiritual welfare of sailors passing through Poole Harbour. In 1015, Canute led a Viking raid to the harbour and used Brownsea as a base to sack Wareham and Cerne Abbey. In the 11th century the owner of the island was Bruno, who was Lord of the Manor of Studland. Following his invasion of England, William the Conqueror gave Studland, which included Brownsea, to his half-brother, Robert de Mortain. In 1154, King Henry II granted the Abbot of Cerne the right of wreck for the island and the abbey continued to control the interests of Brownsea for the following 350 years.
Links: a. Henry II of England b. William the Conqueror c. Cerne Abbey d. Cerne Abbey

Ex Output:
b