Given the task definition and input, reply with output. 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: When did the author of the 2006 essay retire from politics? Passage:Repartition resurfaced as an option with the start of the Troubles. In 1972, the Conservative MP Julian Critchley published a pamphlet for the Bow Group advocating repartition, titled Ireland: A New Partition. Civil servants in London prepared a "last-ditch" plan in 1974, for possible use in the event of a full-scale civil war, which would have seen Roman Catholic inhabitants of the northeast forcibly moved to Fermanagh, southern Londonderry, Tyrone, South Armagh and South Down. Protestant inhabitants of those areas would have been moved into North Down, Antrim, Northern Londonderry and North Armagh. The nationalist areas would then have been ceded to the Republic of Ireland. An alternative plan simply involved "moving individual Catholics from their homes in Northern Ireland to new homes in the Republic". The plan was kept secret at the time and was revealed in 2002. In a 2006 essay, Garret FitzGerald, the Republic's Foreign Minister in 1974, revealed his government's opinions on repartition or a complete British withdrawal.
Links: a. Garret FitzGerald b. Bow Group c. The Troubles d. Conservative Party (UK)
a