If Exposure to Sunlight Causes a Mutation in a Single

If exposure to sunlight causes a mutation in a single proto-oncogene in a diploid cell so that it becomes hyperactive,

A) the remaining unmutated proto-oncogene will prevent the cell from becoming cancerous.
B) tumor suppressor cells will destroy the proteins made from the mutated gene.
C) the cell might produce a protein that pushes it into rapid cell division.
D) the mutated gene will be inactivated by phosphorylation.