user
I come in different shapes and sizes.  Part of me are curves, others are straight.  You can put me anywhere you like, but there is only one right place for me.    What am I?
A: religion
B: crust
C: jigsaw puzzle piece
D: silver
E: feature
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>