Which statement is true about radiocarbon dating? a. after it dies, an organisms body continues to intake c-14. b. radiocarbon dating is useful for dating objects up to 100,000 years old. c. radiocarbon dating assumes that half-life for radiosotopes change over time. d. the half-life of c-14 is 5,730 years.

Explanation:

Radiocarbon dating is method used to determine the age of an animal or object which contains organic material. This can be done thanks to the properties of radiocarbon. Basically, it's a method to measure residual radioactivity, that means after the animal dies it stops exchanging carbon.

Now, one of the most common isotope is Carbon-14. Actually it's used so often that the radiocarbon dating is also called Carbon-14 dating. One of the characteristic of this isotope is that it has a half-life of 5,730 years. This means after an organism has been dead for 50,000 years, there's no enough isotopes to do the test with Carbon-14.

Therefore, the right answer is D.