user
A truck driver is going opposite traffic on a one way street.  A police officer sees him but doesn't stop him.  Why didn't the police officer stop him?
A: device
B: footfall
C: rush
D: he was driving
E: he was walking
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

E

<|end_of_solution|>