Which statement about how geologists study the ages of rock layers is true?

the law of superposition means that older rocks are on top.
geologists can find the exact age of a rock by looking at its relative position.
the principle of original horizontality provides the basis for the law of superposition.
relative age can be determined by using the concept of unconformity.

Option-(C):It is the best option to choose from the given four.

Explanation:

We have the following explanation to the given option selected by us;

Law of superposition- It states that the younger layers of the rock sediments occur on top of the earth surface while, the older layers occur beneath them with a given sequence if there was no disturbance occurred in the sequence formation.Principle of original horizontally: According to the following principle the rock sediments or layers of the earth are formed starting horizontally, as the folded and tilted strata are analyzed through by this principle.

As, the geologist do the analyses of earths layer and they measured the age and the position of the sediments present in the earth layers, to find its properties.