Which of the Following Statements Are True of Human Hair

Which of the following statements are true of human hair and nails (Select all that apply) ?

A) Hair on the scalp provides thermal insulation.
B) A fingernail is made of a very strong form of collagen.
C) Each hair has a small muscle that flattens the hair to protect the skin from cold.
D) Nails protect the proximal ends of the fingers and toes from mechanical injury.
E) Eyelashes help keep dust out of the eyes.
F) Fingernails are useful for picking up small objects.
G) Hairs in the upper nasal cavities protect the nasal sinuses.
H) A nail root or hair root is a site of mitosis.