Fossils of Lystrosaurus, a dicynodont therapsid, are found in parts of modern-day South America, South Africa, Madagascar, India, South Australia, and Antarctica. Fossils of this species are not found in Eurasia or North America. The animal apparently lived in arid regions and was mostly herbivorous. It originated during the mid-Permian period, survived the Permian extinction, and dwindled by the late Triassic, though there is evidence of a relict population in Australia during the Cretaceous period. Judging from the fossil record in sedimentary rocks, these pig-sized organisms were the most common mammal-like reptiles of the Permian. Which of the following is the most likely explanation for the modern-day distribution of dicynodont fossils

A)The dicynodonts could survive for periods of months aboard "rafts" of vegetation, which carried them far and wide, but not to the northern hemisphere.
B) The dicynodonts were able to swim long distances, up to thousands of kilometers.
C) The dicynodonts were evenly distributed throughout all of Pangaea.
D) The dicynodonts were distributed more abundantly throughout Gondwanaland than throughout any other land mass.
E) There had been two previous super-continents that existed at different times long before the Permian period.