user
Black within and red without,  With four corners round and about.   What is it?
A: bowler hats
B: chimney
C: tables
D: bowler hat
E: clock
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>