Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

An alternative investment fund’s hurdle rate is a:
Option A:rate unrelated to a catch-up clause.
Option B:tool to protect clients from paying twice for the same performance.
Option C:minimum rate of return the GP must exceed in order to earn a performance fee.

Answer: C