The Five Statements Below Describe Properties of Radioisotopes

The five statements below describe properties of radioisotopes.Which statement is best used to justify the use of a radioisotope as a treatment for destroying cancer cells in human patients?

A) Each radioisotope gives off energy in the form of radiation.
B) A radioisotope undergoes nuclear decay to form a different element.
C) A radioisotope differs from other isotopes of the same element in its number of neutrons.
D) Radioisotopes can be detected using devices such as Geiger counters that detect radiation.
E) Most elements have at least one radioisotope.