Which statement is an example of false causality?

a.
everyone who lives near that factory seems really unhappy. it must give off a dangerous chemical.

b.
my favorite book gave me this piece of advice, so i follow it.

c.
only young people go to that restaurant. it must only appeal to people who are under 30 years old.

d.
i didn't break the lamp, and you're the only other person here, so you must have done it.