user
It runs up the hill,  And runs down the hill,  But in spite of all,  It stands still. 
A: dash
B: errrrr i duno
C: capitol
D: caster
E: halt
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>