user
Across the canyon, is another, across the cliff, might be another, across the gap, is another. 
A: buffer
B: crevice
C: ravine
D: electric arc
E: rocks
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>