user
what am i ? I am brown all over and when people clean me out i can hear and when somebody hit me i turn red what am I?
A: vision
B: red drum
C: thinking
D: ear
E: ground loop
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

D

<|end_of_solution|>