Can someone help please?

The law of superposition states that layers of sedimentary rock are

A.
ordered in a repeating pattern, with every third layer being identical.

B.
ordered in a random fashion, with the age of the rock varying wildly from one layer to the next.

C.
ordered in a time sequence, with the oldest layers on the bottom and the youngest on top.

D.
ordered according to the age of the volcano that created the layer.