On a trip to the desert, Geraldo finds fossils of ancient oceanic shells. Which of the following best explains how these fossils ended up in the desert?

A.
Oceanic storms washed the shells into the desert.

B.
The desert was once covered by an ocean that receded.

C.
Earthquakes shifted debris from the ocean into the desert.

D.
Animals carried the shells from the ocean to the area for food.