user
A man goes into an elevator and presses the 5th floor, he gets off and walks up the stairs to his apartment on the 15th floor.  He does this every day.  But when he is with a neighbor, he goes to the 15th floor.  Why does he do it?
A: lift
B: tall man
C: scholar
D: prisoner
E: man is a midget
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

E

<|end_of_solution|>