user
I save lives on the ground and in the air.  What am I?
A: terrace
B: stadium
C: mammoth
D: gases
E: seat belt
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

E

<|end_of_solution|>