A geologist is studying a cliff that shows many layers of sedimentary rock under the surface of the ground. What can the geologist conclude about how the rock in the area formed?
A.It formed as weathered rock and soil was deposited in layers.
B.It formed when layers of lava cooled and hardened.
C.It formed when faults caused cracks to form between the layers.
D.It formed when glaciers eroded the surrounding rocks