15 ! and ill give brainliest which statements describe the use of gamma rays to treat cancer? check all that apply. 1. gamma rays have low energy and a source must be placed in the body. 2. gamma rays are absorbed by only the cancer cells. 3. high-energy gamma rays are directed at a tumor from outside of the body. 4.gamma rays kill cancer cells in a tumor. 5. gamma rays are applied to a large area of the body.