Which argument is an example of overgeneralization?

A. My German shepherd bit several family members before I got him a new collar, but has not since then. The new collar must have stopped him from biting.

B. I want to get a German shepherd as a pet, but my friends say that it is likely to bite me and won't be a good pet. I agree with them.

C. I was bitten by a German shepherd as a child, so I do not want to get a dog as a pet because it will bite me.

D. My German shepherd has bitten two people, so I have to send him to the pound or muzzle him.
    Anybody??