Select the Fallacy or Bad Argument Technique Which Occurs in the Following

Multiple Choice

Select the fallacy or bad argument technique which occurs in the following argument: If it's raining, we can't play tennis outdoors. We can't play tennis outdoors, so it must be raining.

A) Tu quoque
B) Epistemic fallacy
C) Fallacy of affirming the consequent
D) Attacking a straw man