Which best describes radiometric dating?

A: Measures the amount of radioactive materials in a sample.

B: Measures the breakdown of radioactive materials in a sample.

C: Measures the accumulation of radiometric materials in a sample.

D: Measures radiometrics.

i think the correct answer is B

its the action in that a radioactive isotope tends to break down into a stable isotope

The answer is; B

Rocks have naturally occurring and spontaneously radioactive atoms in them, such as carbon-14. These element isotopes decay into other types of atoms over millions of years. Therefore, by measuring the amount of these radiometric substances, and knowing the half-life of the isotopes, it is possible to postulate the age of a rock to within certain ranges of error.