Which argument is most clearly making an ad hominem fallacy?
O A. Dr. Rodriguez recommends surgery, but I oppose slicing people
open at a whim.
OB. If we call Star Wars a fantasy, we might as well call Harry Potter
science fiction.
OC. My opponent's proposal should be ignored because she is a
known liar and cheat.
D. Dogs are superior to cats, birds, fish, and other pets because of
their superiority.