In the Following Figure,the Region Indicated by the Arrow Is

In the following figure,the region indicated by the arrow is the only modern-day location of the freshwater lungfish.Fossils of the ancestors of the lungfish,however,have been found all over the world (dots throughout the map) .What does the distribution of these fossils indicate?

A) When Pangaea separated to form smaller continents,the living ancestors of the lungfish were separated.When they died,some of them formed fossils in their new lands.
B) The same species of lungfish evolved on all of Earth's major landmasses after continental drift had stopped.
C) The ancestors of the lungfish existed on Pangaea.After they died,some were fossilized.Their fossils were separated by continental drift.
D) Lungfish were much more successful in the climates of North America than they were in the climates of South America.