14 POINTS
Which statement explains why crocodile fossils are found in western regions of the United States but living crocodiles are not?

a
Crocodiles used to live in the cold climate but adapted to warm climates.
b
The climate changed, and crocodiles could not survive in this region.
c
Crocodiles migrated from Florida to Colorado, where they died.
d
A glacier carried crocodile bones from Mexico to Colorado.