Radioisotopes Used in Medicine Typically Have Short Half-Lives

Multiple Choice

Radioisotopes used in medicine typically have short half-lives.Which of the following statements BEST describes the reason for this?

A) It minimizes the harmful side effects of the radiation.
B) They are the isotopes that are the easiest to make.
C) These radioisotopes occur naturally.
D) Only small amounts of them are required.
E) These radioisotopes emit the correct type of radioactive particle.