Instructions: 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.
Input: Question: How many years before appointing Speranza had Veltroni served as PD secretary? Passage:In February 2008 Speranza was appointed by PD's secretary Walter Veltroni to the national committee of Young Democrats, with the task of creating the new youth organization of the Democratic Party. On 9 November 2009 he was elected regional secretary of the PD for Basilicata. After supporting Pier Luigi Bersani in the 2012 primary election for the choice of the centre-left candidate for Prime Minister in the 2013 general election, he was selected by Bersani to coordinate his 2013 electoral campaign. The centre-left alliance Italy Common Good obtained a clear majority of seats in the Chamber of Deputies, thanks to a majority bonus that has effectively trebled the number of seats assigned to the winning force, while in the popular vote it narrowly defeated the centre-right alliance of former Prime Minister Silvio Berlusconi. Close behind, the new anti-establishment Five Star Movement of comedian Beppe Grillo became the third force, clearly ahead of the centrist coalition of outgoing Prime Minister Mario Monti. In the Senate, no political group or party won an outright majority, resulting in a hung parliament. Speranza was elected to the Chamber of Deputies in Basilicata's electoral constituency.
Links: a. Chamber of Deputies (Italy) b. Basilicata c. Mario Monti d. Walter Veltroni
Output:
d