Aquilegia Formosa (Columbine) Flowers Are Normally Pendant and Pollinated by Hummingbirds.A

Aquilegia formosa (columbine) flowers are normally pendant and pollinated by hummingbirds.A related species, A.pubescens, has flowers that are normally upright and pollinated by hawkmoths.Studies in which the flowers of A.formosa were turned upright and those of A.pubescens were turned downward showed that

A) hybrids rarely form between these species because the two species are not interfertile.
B) hawkmoths prefer one species over the other because of differences between the flowers in the color of light that they emit.
C) hawkmoths show equal preference for the two species if the flowers of A. formosa are turned upright.
D) hawkmoths show equal preference for the two species if the flowers of A. pubescens are turned downward.
E) hummingbirds show equal preference for the two species if the flowers of A. pubescens are turned downward.