user
WHAT KIND OF KEYS CANNOT OPEN?
A: category
B: history
C: knives
D: gender
E: there are monkeydonkey and turkey
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

E

<|end_of_solution|>