What does the half-life of a radioisotope represent? O A. It represents the amount of energy produced by the isotope's
radioactive decay.
O B. It represents the time it takes for half of the material to decay to a
daughter element.
O c. It represents the type of radiation that is being emitted by the
radioactive material.
D. It represents how long the radioactive material has been in
existence in that form.