One example is not enough

Scenario

Someone says, 'My uncle smoked every day and lived to 92, so the dangers of smoking must be exaggerated.'

Question

What is the main flaw in the reasoning?

1. A.It relies on one anecdote to dismiss broader evidence
2. B.It uses too many statistics
3. C.It proves smoking is safe for everyone
4. D.It confuses causes with intentions