user
Two twin walk in a bar and order a scotch on rock.  The bartender put posion in both glasses  the twin that drunk it fast didn't die. But the one who drunk it slow died.  Where was the posion?
A: guinness
B: in the ice
C: supply
D: in the cupboard
E: barkeep
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>