21. In the thylakoid membranes, what is the main role of the antenna pigment molecules?
(A) concentrate photons within the stroma
(B) split water and release oxygen to the reaction-center chlorophyll
(C) harvest photons and transfer light energy to the reaction-center chlorophyll
(D) synthesize ATP from ADP and Pi
(E) transfer electrons to ferredoxin and then NADPH