Among the Uses of the Yellow-Orange Pigment Carotene Is/are

Among the uses of the yellow-orange pigment carotene is/are
A: Providing coloration to the skin
B: Acting as a precursor to Vitamin A
C: Reducing the number of potentially dangerous molecules formed during metabolic activity
D: Improving immune cell number
E: Improving immune cell activity

A) a,c,d,e
B) a,b,c,e
C) b,c,e
D) c,d,e
E) a,b,c,d,e