user
there was a man in jail and his friend asked him who was his visitor.  he said brothers and sisters have i none but this mans father is my fathers son.  who is he
A: descendant
B: cousin
C: gender
D: vistor was his son
E: woman
assistant
<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

<|end_of_thought|>

<|begin_of_solution|>

D

<|end_of_solution|>