user
You use me everyday but let me rest at night.  I have an identical twin beside me all the time.  For some reason you always cover me up.  I am not alive but I have a soul.    What am I?
A: memory
B: your feet
C: my death
D: wheelchair
E: projection
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>