user
Hickory-Dickory-Dock!   The mouse ran up the clock.    The clock struck one   and down did come.    Hickory-Dickory-Dock!    What am I?
A: guillotine
B: water clock
C: use
D: still
E: proprietor
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

A

<|end_of_solution|>