Why is carbon used to date things that were once living? O A. The half-life of carbon depends on age.
B. The amount of carbon is easy to measure.
C. Living things take in carbon from food.
D. Carbon is not toxic to living things.

Explanation:

Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon. ... The carbon-14 method was developed by the American physicist Willard F.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.