Athlete's foot (tinea pedis) is a fungal infection of the skin of the foot. Most athlete's foot is caused by one of two types of fungus. Trichophyton mentagrophytes often causes toe web or vesicular (blisterlike) infections.
From ages 3-16 it is the most rapid, and gradually slows down.
I think
C. provide an objective measure of physical fitness
Its between C and D for me.But I think D is the answer.