The symbols found on the map below indicate where fossils have been found in the same layer of sediment. Each unique symbol represents fossil locations of a particular species.

What do the locations of the fossils suggest?
A.
The continents' locations have remained constant throughout time.
B.
Similar fossil types are never found on different continents.
C.
The continents were once connected to each other.
D.
Each continent has completely unique plant and animal life.