Oncogenes are genes that A) fight cancer. B) suppress the normal activity of immune system. C) can signal cells to reproduce uncontrollably. D) have mutated.?

The correct answer is C) can signal cells to reproduce uncontrollably.

Oncogenes are mutated genes that can cause cancer. They are often found in cancer cells and are responsible for the uncontrolled growth and division of cells. This can lead to the formation of tumors and the spread of cancer to other parts of the body.