Which of the following is the most likely explanation for the modern-day distribution of dicynodont fossils?

A) There had been two previous supercontinents that existed at different times long before the Permian period.
B) The dicynodonts were evenly distributed throughout all of Pangaea.
C) The dicynodonts were distributed more abundantly throughout Gondwanaland than throughout any other land mass.
D) The dicynodonts were amphibious and able to swim long distances.
E) The dicynodonts could survive for periods of months aboard "rafts" of vegetation, few of which made their way to the northern hemisphere.