The Gene L Determines Hair Length in Rabbits

The gene L determines hair length in rabbits. The gene B determines hair color. A rabbit with long, black hair is crossed to a rabbit with short, white hair. All the offspring have long, black hair. What are the genotypes of the parents?

A) LLBB × llbb
B) Llbb × llBb
C) LlBb × LlBb
D) LlBb × llbb
E) Impossible to determine from the information given