A geology student wants to apply the law of horizontality to determine the age of a rock taken from an area. What can the student determine about the rock based on this law?
A.
The rock is the same age as all other rocks found at the same depth.
B.
The rock is the same age as all other rocks found in the same layer.
C.
If a fossil is in the same layer where the rock was found, the rock is older.
D.
If a fossil is found at the same depth as the rock, the rock and fossil are the same age.