user
Two birds, trying to balance in one twig. 
A: nester
B: caprimulgiformes
C: earrings
D: plume
E: slip
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>