Cancer
a. is a relatively new disease, first diagnosed during the latter half of the 19th century.
b. is a group of diseases marked by the growth and spread of new cells.
c. is due to a parasite that attacks new cells.
d. is due almost completely to contact with dangerous chemicals.

Respuesta :

The answer is C
Cancer attacks normal cells, growing into a massive tumor is not treated
The correct answer is C as cancer is the uncontrolled growth of a particular cell that becomes harmful to other cells in the body