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: When was the football club Stanislas joined at age 10 founded? Passage:Born in Kidbrooke, London, Stanislas first joined West Ham United as a schoolboy at the age of 10. In May 2006, Stanislas signed a three-year academy scholarship. He made his Premier Academy League debut in a 32 defeat to Watford on 8 April 2006, at the age of 16. He became a regular for the Academy in the 200607 season, appearing 26 times and scoring 9 goals as West Ham finished as runners-up to Arsenal. He carried his goalscoring form into the 200708 season, scoring 10 goals in 24 appearances. He made his Premier Reserve League debut on 29 August 2007, in a 21 defeat to Aston Villa. His first goals came in the 80 rout over Derby County, as he netted a brace. He was part of the first-team squad that travelled to North America in the summer of 2008 for the pre-season tour. He started the 200809 season in the reserves, scoring his first goal of the season on 21 October 2008, in a 10 home win over Arsenal.
Links: a. Arsenal F.C. b. Watford F.C. c. 200708 Premier Academy League d. West Ham United F.C.
Output:
d