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 long has the Scottish Football Association been in existence when they delayed processing Cadete's registration? Passage:On 24 February 1996, Cadete was introduced at Celtic Park, Glasgow to supporters before Celtic's league match against Partick Thistle. However, due to lengthy negotiations between Celtic and Sporting and issues with registering the player, his transfer was not finalised until April, and turned out to be controversial: despite being signed prior to the transfer deadline, the Scottish Football Association delayed processing his registration in time for the Scottish Cup semi-finals against Rangers at Hampden Park, and following a complaint from Celtic chairman Fergus McCann, SFA chief Jim Farry was eventually relieved of his duties after being found guilty of deliberately holding back the player's registration. His eventual debut came at home against Aberdeen as he came off the bench to score his team's fifth goal in a 50 win, thus becoming an instant hit; the loud roar generated by the fans celebrating his goal blew out BBC Radio 5's microphones, who had been covering the game UK wide on radio, and they went off air for a short time until it was repaired.
Links: a. Celtic Park b. Scottish Cup c. Scottish Football Association d. Scottish Football Association
Output:
c