Which of the following best explains the concept of radioactive dating?

radioactive elements decay at a rate that is directly proportional to temperature, and scientists can compare the amount of a radioisotope at different temperatures to determine a sample’s age.
radioactive elements break down at an unpredictable rate, and scientists measure the amount of a radioisotope and compare it to the concentration of other radioisotopes to determine a sample’s age.
radioactive elements break down at a predictable rate, and scientists compare the amount of a radioisotope to its decay products to determine the sample’s age.
radioactive elements decay at a rate that is inversely proportion to pressure, and scientists can measure the amount of radioisotope in different rock layers to determine a sample’s age.