user
Everyone has me except for a few.  You may not be able to identify me but I can always identify you.  What am I?
A: affinity
B: scorecard
C: your fingerprints
D: NAME
E: features
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

C

<|end_of_solution|>