user
My first is twice in apple but not once in tart.  My second is in liver but not in heart.  My third is in giant and also in ghost.  Whole I'm best when I am roast.  What am I?
A: common sense
B: word pig
C: scrabble
D: leviathan
E: merit
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

B

<|end_of_solution|>