Answer:
A. using radiation to treat a cancer patient
Explanation:
Radiotherapy is a treatment in which ionizing radiation (X-ray, for example) is used to destroy a tumor or prevent its cells from enlarging. These radiations are not seen and during application the patient feels nothing.
Cancer patients are treated with radiation and the result is usually very positive. For many patients, it is a very effective way, causing the tumor to disappear and the disease to be controlled or even cured. When it is not possible to cure, radiotherapy can contribute to the improvement of quality of life. That's because applications shrink the size of the tumor, which relieves pressure, reduces bleeding, pain and other symptoms, providing relief to patients.
Although radiotherapy tends to cause more side effects. It is important to remember that most patients will only have some of the side effects, like nauseas, vomiting, fatigue, hair loss, and the destroy of cell (not just the "bad" cells but also the "good" ones, which are responsabile to defend the organism).
