If All Offspring of a Cross Have the Same Heterozygous

Multiple Choice

If all offspring of a cross have the same heterozygous genotype,the parents of the cross would most likely be

A) homozygous dominant and homozygous recessive.
B) both heterozygous.
C) heterozygous and homozygous recessive.
D) homozygous dominant and heterozygous.
E) both homozygous dominant.