user
What has wings but can't fly? And sucks blood but has no teeth?
A: pen
B: pulp
C: always ultra  period pads
D: type
E: clutter
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>