This dark mass on skin, a form of skin cancer, is directly due to

Skin cancer in skin of color - Journal of the American Academy of Dermatology

a
meiotic division of normal cells.
b
the crowding of released antigens.
c
production of excessive protein inhibitors.
d
the uncontrolled mitosis and growth of abnormal cells.

d

the uncontrolled mitosis and growth of abnormal cells.