user
there is a coffin, the mother of the person in the coffin is the mother-in-law of your mother,.  who is the person in the coffin?
A: your father    
B: yeast
C: motherland
D: mater
E: machine
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

A

<|end_of_solution|>