Answer:
d. the relative age of these rock layers
Step-by-step explanation:
Principle of superposition -
It is the form of relative dating , where the relative age of the rocks are determined .
It is on of the important principle for the study of geological stratigraphy .
According to the principle of superposition , the bottom most layer of the strata is one of the oldest one , and the top most is the most recent one .
Hence , the relative age of the rock can easily be determined by using this principle of superposition .