It kills cancer cells. It produces healthy cells. It improves immune system function. It prevents many forms of illness in patients.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following is a benefit of using radiation as a medical treatment?
Possibilities:
- It kills cancer cells.
- It produces healthy cells.
- It improves immune system function.
- It prevents many forms of illness in patients.

It kills cancer cells.