You will be given a definition of a task first, then some input of the task.
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: How old was John O'Mahony when he led the 1998 championship? Passage:In the 1998 championship, led by Mayo-born manager John O'Mahony, Galway won their first round encounter with Mayo, before overcoming Leitrim by 1-16 to 0-05 in the semi-final. The first final ended as a draw, 11 points apiece with Roscommon, but Galway won the replay in Hyde Park. In the semis, Galway came up against Ulster champions Derry, and won by 0-16 to 1-09. In the final the team faced a Kildare team that had just beaten the previous year's champions, Kerry, and were coached by 8 time All-Ireland winning manager Mick O'Dwyer. Galway went into the final as underdogs, but outstanding performances from Ja Fallon and Michael Donnellan in that match, along with a superbly taken goal from a young Padraig Joyce, helped Galway overcome the Lilywhites by 1-14 to 1-10. Captain Ray Silke lifted the Sam Maguire, and Galway became the first Connacht team in 32 years to win an All-Ireland title.
 Links: a. Sam Maguire Cup b. Derry GAA c. Roscommon GAA d. John O'Mahony (Mayo politician)
Output:
d