user
what can be seen during the day, but is lost in the night?
A: Creativity
B: shadow    
C: illumination
D: color
E: time of day
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>