Why doesn't asexual reproduction result in variation among offspring and parents?

Asexual reproduction is the creation of offspring from one parent. There is no mating or mixing of genetics in asexual reproduction. Asexual reproduction results in a clone of the parent, meaning theoffspring has identical DNA as the parent. There is usually no variation from generation to generation in a species population

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.