Hi, Shia! It's letter B. It could also mean you don't have any negative intentions towards her. :)

It could be A, B or both; but not C.

"B" is the only correct answer. "A" is wrong because whether or not I think she is "bad" has no necessary connection with "having nothing against her". "Bad" is such a vague word. A person can be "bad" in so many different ways. Likewise, "C" has no relationship with "having nothing against her". For example, I might read in the newspaper about a person who has bad intentions. However, since I don't know her and she is not part of my personal life, why would I have anything against her?

D