user
I take off my clothes when you put on your clothes.  I put on my clothes when you take off your clothes.  What am I?
A: array
B: cotton
C: clothes hanger
D: on a ladder
E: wool
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>