index fossils law of superposition radiometric dating law of original horizontality
I gave my students this multiple choice question: Which method would be best for scientists to use to determine the absolute age of a Precambrian igneous rock?

Only one answer is correct among these 4 choices:
- index fossils
- law of superposition
- radiometric dating
- law of original horizontality

Could you tell me which one is correct?

radiometric dating