instruction:
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.
question:
Question: What's the average lifespan of the animal that has a jaw with properties similar to those that probably led to the evolution of baleen? Passage:The oldest true fossils of baleen are only 15 million years old because baleen rarely fossilizes, and scientists believe it originated considerably earlier than that. This is indicated by baleen-related skull modifications being found in fossils from considerably earlier, including a buttress of bone in the upper jaw beneath the eyes, and loose lower jaw bones at the chin. Baleen is believed to have evolved around 30 million years ago, possibly from a hard, gummy upper jaw, like the one a Dall's porpoise has; it closely resembles baleen at the microscopic level. The initial evolution and radiation of baleen plates is believed to have occurred during Early Oligocene when Antarctica broke off from Gondwana and the Antarctic Circumpolar Current was formed, increasing productivity of ocean environments. This occurred because the current kept warm ocean waters away from the area that is now Antarctica, producing steep gradients in temperature, salinity, light, and nutrients, where the warm water meets the cold.
 Links: a. Antarctic Circumpolar Current b. Dall's porpoise c. Salinity d. Salinity
answer:
b


question:
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
answer:
a


question:
Question: What year did Carroll participate in the Make Poverty History protest? Passage:When aged 16, Carroll fund-raised with fellow activists to travel to Edinburgh for the Make Poverty History protest. He contested the 2011 Belfast West by-election—triggered by the resignation of Gerry Adams—for the People Before Profit, and won 7.6% of the vote. At the 2014 Belfast City Council election he gained one of the seven seats in the Black Mountain electoral area from Sinn Féin, coming third. Following his election, he said that he did not describe himself as a nationalist or a unionist, instead choosing to identify as a socialist. He said: "There is a lot of anger in West Belfast at the minute over the situation at Royal Victoria Hospital's A&E, the privatisation of leisure centres and the Casement Park issues...residents have been trampled on". He contested Belfast West again at the 2015 general election, this time coming second, gaining 19.2% of the vote and reducing the Sinn Féin majority from 57.1% to 35.0%.
 Links: a. Irish nationalism b. Irish nationalism c. Make Poverty History d. Irish nationalism
answer:

c