What proof do we see that the Law of Dominance actually exists? select all that apply

A when crossing two homozygous dominant flowers, 100% of the offspring are of the dominant color.

B when crossing a homozygous dominant flower with a homozygous recessive flower, 100% of the offspring are of the dominant color.

C when crossing two hybrid flowers, 75% of the offspring are of the dominant color.

D when crossing two homozygous recessive flowers, 100% of the offspring are of the recessive color.