user
I am someone you use everyday.  You always walk in it.  what am I?
A: go
B: journey
C: alias
D: door
E: use
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

D

<|end_of_solution|>