How Could You Distinguish Between a Root Hair Versus a Very

How could you distinguish between a root hair versus a very small root?

A) Root hairs are white,while roots are brown.
B) Root hairs are extensions of single cells,while roots are multicellular.
C) Root hairs only absorb water,not nutrients like roots.
D) Root hairs do not have a cuticle.
E) The epidermis of a root hair is thinner than the epidermis of a root.