Debbie Observes That Leaves Fall from Trees Before the Fist

Multiple Choice

Debbie observes that leaves fall from trees before the fist day of winter, and concludes that the falling leaves cause winter to begin. This is an example of

A) ceteris paribus.
B) the post hoc, ergo propter hoc fallacy.
C) the fallacy of logic.
D) Ockham's razor.