user
I can trap many different things and colors,  Ever changing, not boring.   Look closely and you may find yourself also caught in my trap.    What am I?
A: mirror or pool of water
B: catching
C: beaver
D: primary colour
E: strike
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

A

<|end_of_solution|>