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 fought in the Nagorno-Karabakh War? Passage:Aram Sarkissian (Simon Abkarian) is a young French-Armenian member of AGJSA, an Armenian militant organization, who leaves his family in Paris to fight in the Nagorno-Karabakh War. In October 1993, Aram returns to France to live a "normal life" again, but finds his younger brother Levon (Mathieu Demy) preparing the assassination of Azbalan Djelik, a general of the Turkish Army visiting France. Aram opposes the assassination, claiming the Armenian struggle lies in Nagorno-Karabakh, however, Levon considers Aram to be a coward, who then reluctantly agrees. One evening, General Djelik is killed when his car is ambushed by 3 masked gunmen, who shoot and kill three of the four passengers. The survivor, Djelik's aide-de-camp Colonel Talaat Sonlez (Serge Avédikian), shoots Levon after he pretended to be dead. Levon is immobilized and enters a coma, and Sonlez is shot by the Armenians before they flee. AGJSA claims responsibility for the attack, justifying it as General Djelik was a high-ranking member of the Black Wolves, a Turkish ultranationalist organization. Talaat survives again, and searches for the assassins by asking Monsieur Paul (Gilles Arbona), a French counter-terrorism policeman monitoring the activities of AGJSA, who does not reveal their identities.
 Links: a. Counter-terrorism b. Militant c. Nagorno-Karabakh War d. Nagorno-Karabakh War
Example Output: c

Example Input: Question: How old was the winner of the 18th season of Celebrity Big Brother when they won? Passage:The third series of the show began on 11 August 2015. The official list of cast members was released on 14 July 2015. This series was filmed in Cancun, Mexico, making this the first series to be filmed outside of Europe. They include four boys: Graham Griffiths, Jayden Robins, Kirk Norcross and Stephen Bear, and four girls: Amy Paige Cooke, Laura Alicia Summers, Megan McKenna and Megan Rees. With the announcement of the line-up it was confirmed that former Geordie Shore cast member and star of the first series, Vicky Pattison, would be making her return as an ex alongside Series 2 star Rogan O'Connor. The Only Way Is Essex cast member Kirk Norcross was also confirmed to be taking part in the series, with his ex-fiancée and Celebrity Big Brother star Cami-Li featuring as his ex. Star of Magaluf Weekender Jordan Davies was also revealed to be taking part in the series, also featuring as an ex. Megan McKenna and Jordan later returned for the fourth series. On 5 January 2016, cast member Megan McKenna entered the Celebrity Big Brother house to compete in the seveneeth series, and on 28 July 2016, Stephen Bear entered the house to compete in the eighteenth series where he left as the winner. Jordan Davies made another return to the show, this time during the fifth series with Jemma and Bear, and Holly also returning as an ex again. In August 2017, both Jemma Lucy and Jordan Davies took part in the twentieth series of Celebrity Big Brother.
 Links: a. Stephen Bear b. Stephen Bear c. The Only Way Is Essex d. Ibiza Weekender
Example Output: a

Example Input: Question: Did Seungri's car accident in Shanghai happen before or after he left Big Bang? Passage:There have been a number of car accidents involving Korean idols being followed by sasaeng fans. In 2011, two members of the band Super Junior were caught in a six-car collision after being chased by eight fan vehicles in Singapore. The band members, Leeteuk and Heechul, were unharmed, but Heechul later tweeted that he still suffered after-effects from the accident and was often afraid to drive. In 2013, Seungri, formerly of the band Big Bang, suffered minor injuries in a car accident in Shanghai involving a sasaeng fan. In 2015, Chanyeol of the band Exo wrote on Weibo that he was constantly followed by 20 fan vehicles during a visit to Shanghai. In 2016, Jackson of Got7 sustained minor injuries in an accident on the way to an airport in China that involved a fan closely following his car.
 Links: a. Sina Weibo b. Park Chanyeol c. Seungri d. Seungri
Example Output:
c