user
Why do ducks have feathers on their butts?
A: contour feather
B: west virginia
C: to hide their butt quacks
D: ducky
E: they cannot fly
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>