Which logical fallacy is used in the text?
I don't trust Professor Silva's findings. Another researcher at her university was caught falsifying data. So, it's likely Professor Silva has, too.
A. guilt by association: a negative association intended to discredit someone or something
B. false dichotomy: an argument that presents only two choices when more options exist
C. appeal to nature: the assumption that natural things are always good
Determine the correct option from the provided choices and reply with its corresponding letter.

A