user
With a halo of water and a tongue of wood, stone as skin long i stood what am i?
A: beaver
B: fireplace
C: woman
D: castle
E: board game
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

D

<|end_of_solution|>