The statement, "Eat carrots because they are good for your eyes," is correct because:
a. protein in carrots is important for the development of keratin, which forms the retina.
b. the vitamin A precursor in carrots becomes activated to form rhodopsin in the eye.
c. retinol in carrots will be transported to the eyes to prevent infections.
d. beta-carotene is stored in the eyes to be used for night vision.