The boulders, rocks, and pebbles at the base of this cliff are the same kind of rock as the cliff itself. What can you conclude from this evidence? Check all that apply.


A.
Waves are causing the cliff to crumble.


B.
The boulders, rocks, and pebbles were originally part of the cliff.


C.
The cliff is eroding, so the lighthouse was not built in a safe location.