What is Responsible for the Yellow-Orange Coloration of Leaves in the Fall

Question

What is responsible for the yellow-orange coloration of leaves in the fall?
A)RuBP
B)chlorophyll a
C)carotenoids
D)chlorophyll b

Accepted Answer

Carotenoids are pigments that are responsible for the yellow-orange coloration of leaves in the fall, as chlorophyll breaks down and these pigments become more visible.