Why Do Many Argue That "Race" Is Not a Scientifically

Multiple Choice

Why do many argue that "race" is not a scientifically useful category?

A) Humans have exhibited so much inbreeding that we cannot divide humans into discreet groups.
B) There are too many mutually exclusive racial groups to be able to work with in any practical way.
C) There are no known genetic differences across what we call "races."
D) Individuals can change their biological "race" within their own lifetime.