Which statement is true for organisms that are classified in the same genus?

A. They look different from each other

B. They are members of the same species.

C. They live in the same kind of environment.

D. They are in the same family.

I believe the correct answer is D) they are in the same family.

A) is certainly not correct, because they can look different, although they don't have to.

B) species is a lower taxonomic rank than genus

C) they don't have to live in the same kind of environment