A geologist uses relative dating methods to guess that a rock is between 1 million and 5 million years old. What is one radioactive isotope the
geologist can use to learn the exact age of the rock? Explain your answer.

c should be the answer

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

c is the answer. hope this