Carbon-14 Is a Radioactive Isotope of Carbon

Carbon-14 is a radioactive isotope of carbon.When an organism is alive, the total amount of carbon-14 in the organism's body remains constant.As soon as the organism dies, the amount of carbon-14 begins to decrease in a predictable way.This provides evidence for which statement about living organisms?

A) Different organisms have different life-spans.
B) Living organisms are dynamic and constantly exchanging matter with the environment.
C) There is a huge diversity of life-forms represented among the organisms living today.
D) All living organisms are composed of cells.
E) Living organisms pass on biological information to their offspring.