Question

i always give out medals

n a series of rock layers, a geologist finds fossilized shellfish and bony fish in layers that are 1.0 m and 1.5 m deep. However, in a layer that is 2.0 m deep, he finds fossils of a lizard-like dinosaur and a fern-like tree.

Which explains his findings?

A.
The ancient sea dried up and became land.

B.
An asteroid hit the area, causing the dinosaur to become extinct.

C.
The continent shifted to a polar region.

D.
The ancient land area was invaded by a sea.