user
a father (who's a doctor) and his son were driving in a car and they get into a horrible accident.  the father dies and the son is in critical condition.  the ambulance arrives and brings the son to the hospital.  the doctor is about to operate on the son until the doctor said "i can't operate on him, he's my son".  Who's the doctor that won't operate on the son?
A: disinfectant
B: emergency room
C: cord
D: waiting room
E: mother is doctor
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

E

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