In the dry and hilly region of southeast Utah, many fossil remains have been uncovered. Trilobite casts, petrified bones of alligators, and preserved dinosaur footprints, were all found in the same location, but in different rock layers. What do these fossil remains tell about the history of this region?
A. this area was a gathering place for a variety of animals
B. ancient flooding in this region washed fossil remains into this area
C. the Earth's surface and climate has changed over time
D. this region has always had hot, dry climates
