A. Planned is not a good word to describe exercise.
Answer:
Genetic mutations causing the malfunction or absence of one or more of the regulatory proteins at cell cycle checkpoints can result in the "molecular switch" being turned permanently on, permitting uncontrolled multiplication of the cell, leading to carcinogenesis, or tumor development.
Explanation:
The hepatitis one...I think. if you know for sure I an wrong then it's definitely the first one about HIV
