Vitamin a Plays a Critical Role in Night Vision Because

Vitamin A plays a critical role in night vision because:

A) it is required for the synthesis of the retinal portion of rhodopsin.
B) it is transformed into the opsins found in cone cells.
C) it acts as the coenzyme required to degrade scotopsin in brightly lit circumstances.
D) it catalyzes the mitotic generation of light-reflecting epithelial cells which support widely dispersed rod receptors.
E) it deactivates the photopigment-transducing chemical pathways within cone cells.