Definition: 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: When was CA Osasuna founded? Passage:After his performance at the 2006 World Cup Nekounam was linked to the likes of Hertha BSC of the Bundesliga and Ligue 1's Olympique Lyonnais, but he eventually joined CA Osasuna on a two-year contract, with an option to a third year and a 5 million minimum release-fee clause on his contract he thus became the first Iranian player to be signed by a Spanish club. On 22 February 2007, he scored in the 120th minute of the match against FC Girondins de Bordeaux for the knockout stages of the UEFA Cup to help to a 10 home win and aggregate score, and after a particularly successful first season began to attract interest from other European sides, notably Scotland's Rangers who had a 1 million pound offer rejected.
Links: a. CA Osasuna b. FC Girondins de Bordeaux c. UEFA Europa League d. 200607 La Liga
Output:
a