The diagram below shows a happy family of mice, with two parents and four offspring. However, one of the offspring mice is an imposter. The black-fur parent has the genotype FF Ee, and the white-fur parent has the genotype ff Ee. Given these parent genotypes, which offspring mouse could not have been born to these parents?

Offspring A (Ff Ee)

Offspring B (Ff EE)

Offspring C (Ff ee)

Offspring D (ff EE)