Which logical fallacy is used in the text?
I've heard that fast food can lead to health problems, but I don't believe it. My grandpa ate fast food every day of his adult life, and he lived to be ninety-one.
A. appeal to nature: the assumption that natural things are always good
B. slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences
C. hasty generalization: a broad claim based on too few observations
Choose the right answer from the options and respond with its letter.

C