Answer:
A. Hypermutagenesis
Step-by-step explanation:
It refers to an increase in mutations due to defects in proteins needed to repair mutated DNA. When the proteins that normally repair DNA are not functioning properly, errors in DNA replication can accumulate more frequently, leading to an increase in mutations. This can be caused by genetic mutations that affect the repair proteins themselves, or by exposure to certain chemicals or radiation that can damage DNA. Genetic instability is a broader term that refers to any condition in which the genetic material of a cell or organism is prone to change or instability, which can include hypermutagenesis as well as other types of genetic changes. An oncogene is a gene that has the potential to cause cancer when mutated or overexpressed.