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 date did the Journal publish the report of Theresa May appearing on Eastenders? Passage:On April Fools' Day 2019, TheJournal.ie published a report on Prime Minister Theresa May's scheduled appearance on that night's special live episode of EastEnders, details of which had been leaked by Taoiseach Leo Varadkar overnight. May's purpose was to issue a final plea for unity as Brexit entered a critical stage. The internet publication featured a photograph of May in The Queen Victoria pub, with the caption "Rehearsal shot of hostile locals witnessing May's arrival". It even went so far as to compose fake documents to back up its claim, including a draft script said to have been provided by the BBC to highlight the ever-changing difficulties of keeping up with political events as they rapidly unfolded: "'This is the 416th draft' the source said. 'And her appearance was only confirmed at the start of March. Brexit won't stop f*****g, c*****g changing every two seconds. It's driving the actors mad.'" A short video clip shows actor Adam Woodyatt (who portrays the character of Ian Beale) being comforted by colleague Steve McFadden (who portrays the character Phil Mitchell), as Woodyatt bursts into tears due to the protracted rehearsals. The preliminary script — which, TheJournal.ie reminded readers, was "contingent on what the hell happens in Brexit over the course of today" — had Dot Cotton (played by June Brown) gasping as Theresa May enters the pub. May, having begun her speech, is interrupted by Mick Carter (played by Danny Dyer) who knocks over a pint and a chair in his efforts to have the Prime Minister leave the pub. May departs and perches herself despondently on a park bench, whereupon Kat Slater (played by Jessie Wallace) approaches her with "Alright love? What's getting you down?" May tells Slater she has already blamed everyone — the Irish, the Democratic Unionist Party, the European Union — and is at a loss for who is left for her to find fault with now. Slater advises her to be honest. May finds solace in this, thanks Slater, remarks on the chilliness of the night and Slater hands the Prime Minister her leopard print jacket to put on. May returns to the pub and seemingly converts all the customers bar Dot Cotton, who is promptly ejected onto the street.
 Links: a. June Brown b. June Brown c. April Fools' Day d. Taoiseach
Example Output: c

Example Input: Question: How long did the king who was painted by Jan Matejko rule Poland? Passage:Modern history accepts this gateway as one of three constructed by Yaroslav the Wise. The golden gates were built in 1017-1024 (6545 by the Byzantine calendar) at about the same time the Saint Sophia Cathedral was erected. Mentions of an older construction, such as the one presented on a painting by Jan Matejko of king Bolesław I of Poland striking the Golden Gate with his sword during the intervention in the Kievan succession crisis in 1018, it is now regarded a legend. Originally named simply the Southern Gate, it was one of the three main entrances to the walled city, along with the Ladski and Zhydivski (Polish and Jewish) Gates. The last two have not survived. The stone fortifications stretched for only 3.5 km. The fortification of the Old Kyiv (Upper City) stretched from the Southern Gates down to what is now Independence Square and where the Lechitic Gate was located. From there, the moat followed what is now Kostyol Street, skirting St. Michael's Monastery and continuing along today's Zhytomyr Street toward the Jewish Gates (at ). From there, the fortification stretched what is now Yaroslaviv Val ("Yaroslav's Rampart") Street back to the Southern Gate.
 Links: a. Bolesław I the Brave b. Maidan Nezalezhnosti c. Bolesław I the Brave d. Lechites
Example Output: a

Example Input: Question: How many years did the Great Depression last? Passage:Originally from New Brunswick, Harrison graduated from Nova Scotia Agricultural College in 1922, and, in 1924, from the Ontario Agricultural College with a B.Sc. in agriculture. He earned an MSc in plant pathology from Macdonald Campus of McGill University a year later. A doctoral degree he started at the University of Toronto in 1929 was abandoned due to the Great Depression. He established a herbarium of mycological specimens where he was employed for many years at the Kentville Research Station (now the Atlantic Food and Horticulture Research Centre); most of his collections are now housed at the Canadian National Mycological Herbarium. His early research concerned the fungal infestation of plants, such as that of Colletotrichum lindemuthianum on beans (Phaseolus). Working with John Frederick DeWitt Hockey, they made many contributions to the control and prevention of diseases of horticultural crops. They were among the first to use the sticky slide spore trap to estimate the densities of fungal spores.
 Links: a. Spore b. Ontario Agricultural College c. Master of Science d. Great Depression
Example Output:
d