In Cats, Short Hair (L) Is Dominant to Long Hair

Multiple Choice

In cats, short hair (L) is dominant to long hair (l) . If a short-haired cat of unknown genotype is crossed with a long-haired animal, and they produce one long-haired kitten and one short-haired kitten, this would indicate that ____.​

A) ​the short-haired cat was true-breeding
B) ​the short-haired cat was not true-breeding
C) ​the long-haired cat was not true-breeding
D) ​the long-haired cat was heterozygous
E) ​neither parent was true-breeding