The Following Questions Refer to the Description Below

The following questions refer to the description below.
Biologists are studying pollination of one species of alpine flower in the Canadian Rocky Mountains. In late spring and early summer, they find that the majority of flowers are deep red and deep pink. Toward the end of summer, the most common colours are white and very pale pink.
-What is the most likely explanation as to why the colours of the flowers from the same plants change from dark red to white as summer progresses?

A) The alpine flowering plant produces red pigment early in the season but, as the pigment amount decreases over time, the flowers produced are mostly white,
B) Biologists suspect that a pollinator that prefers red flowers pollinates the flowers early in the season, while a second pollinator that prefers light-coloured and white flowers pollinates the flowers later in the season.
C) The same pollinator is attracted to both colours equally.
D) Herbivores trample the early flowers so only the pale pink and white flowers remain.
E) The flowers are likely wind pollinated, so flower colour changes randomly.