user
What is black and white, has a horn and gives milk?
A: white noise
B: milk truck
C: trade
D: tortoiseshell
E: egg
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>