A Sterile Mule Is Produced by Mating a Horse and a Donkey.From

A sterile mule is produced by mating a horse and a donkey.From this observation you could conclude

A) that horses and donkeys are the same species.
B) that horses and donkeys are different species.
C) that mules are a result of macroevolution.
D) increasing the number of mules in a population will affect the allele frequency in the next generation.
E) the DNA sequences of horses and donkeys are more than 97% identical.