A Friend's Mother Shows You a Spot on Her Skin

A friend's mother shows you a spot on her skin which is enlarging, has blue, black, and brown colors in it, and has an irregular border. It is a bit bigger than the size of a pencil eraser. You advise her:

A) Not to worry, it has the characteristics of a benign mole.
B) Not to worry, whatever it is, it can be removed with over-the-counter products, such as Compound W.
C) To watch the spot for several months, in order to see if it increases in size.
D) To see her doctor.