A traumatic injury to the body has occurred. A disruption in the cell cycle has taken place. A response by the immune system was triggered by an allergic reaction. A mutation occurred during the process of crossing over.
I gave my students this multiple choice question: Which factor best explains how many diseases, such as cancer, are formed within the body?

Only one answer is correct among these 4 choices:
- A traumatic injury to the body has occurred.
- A disruption in the cell cycle has taken place.
- A response by the immune system was triggered by an allergic reaction.
- A mutation occurred during the process of crossing over.

Could you tell me which one is correct?

A disruption in the cell cycle has taken place.