Which of the following statements is true regarding the involvement of sexual selection on male function (pollen donation)leading to sexual dimorphism in flowers?

A) Female flowers typically receive far more pollen than is needed to fertilize their seeds.
B) Delph and colleagues (1996) found that out of 42 animal-pollinated plant species, 29% of females had the largest reproductive parts, but males had the largest perianths.
C) Studying wild radishes, Stanton and colleagues (1996) found that reproductive success through pollen donation was limited by pollinator visits, whereas reproductive success through seed production was not.
D) All of the above statements are true.