Living and Fossil Nothofagus, the Southern Beech Tree, Are Found

Living and fossil Nothofagus, the southern beech tree, are found in parts of New Guinea, Australia, Antarctica and South America. This is considered to provide evidence for the theory that

A) extensive sea level changes must have occurred in the past.
B) the pattern of climate change in these areas must have been similar.
C) these continents were close enough for dispersal by air and ocean currents.
D) these continents were once joined in a supercontinent.
E) land bridges connected these continents across which plants and animals could disperse.