Which fact about fossils is most important to scientists who study evolution?
a) fossils are often found in sedimentary rock.
b) footprints, body structures, and even animal droppings can become fossilized.
c) the age of a fossil can be determined by examining the rock strata in which the fossil is found.
d) the formation of a fossil depends on the geologic and chemical conditions present when an organism dies.

Option C, The age of a fossil can be determined by examining the rock strata in which the fossil is found.

Explanation:

The age of a fossil is generally determined by two methods - a) Relative dating and b) Absolute dating.  

In relative dating the age of the fossil is determined by comparing the age of fossil with the age of the rock in which it is found.  

Radiometric dating is the process by which the decay of radioactive elements such as potassium and sodium is determined in order to derive the age of rock and hence the age of fossils.  

Hence, option C is correct

carbon atoms, hydrogen, oxygen, and nitrogen.

d we did this already