geological evidence indicates that two land masses become seperated by a deep ocean channel....?

geological evidence indicates that two land masses become separated by a deep ocean channel 45 million years ago and have been moving apart ever since. You are studying a group of organisms that is widespread as a native part of the biota on both of the land masses. what can you conclude about the groups evolutionary history?

A. the groups ancestors were definitely present on the original land mass before it broke up.
B. The groups ancestors cannot have been presented on the original land mass before it broke up.
C. It depends on the disperable abilities of the organism. If the organism cannot move accross the open Oceanit is very likely that the group's ancestors were present on the original land mass before it broke up.
D. Nothing. Continental drift is geological theory and cannot shed light on biological evolution.
E. The groups ancestors must have independently colonized each of the land masses from a third location eithin the past 45 million years.