user
Walk on the living they don't even mumble,  Walk on the dead they mutter and grumble,  What are they?
A: lack
B: decomposing
C: pavement
D: fallen leaves
E: middle
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

D

<|end_of_solution|>