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 team Markus joined after the Wormatia Worms formed? Passage:Muller began his career with Erzgebirge Aue, and made his debut in the 2. Bundesliga in April 2008, replacing Florian Heller in a 00 home draw with 1. FC Kaiserslautern. He left Aue in January 2009 to join Hallescher FC of the Regionalliga Nord, where he spent two and a half seasons, being released in June 2011 after injury had restricted him to just eight appearances in the previous season. He subsequently joined SV Babelsberg 03 of the 3. Liga, for whom he scored 12 goals in the 201112 season. After Babelsberg were relegated in the 201213 season, he left to sign for Wormatia Worms, where he spent six months before joining Kickers Offenbach.
Links: a. FC Erzgebirge Aue b. 201112 3. Liga c. Kickers Offenbach d. FC Erzgebirge Aue
Output:
c