The Following Question(s) Refer to the Evolutionary Tree in Figure

The following question(s) refer to the evolutionary tree in Figure 22.4, whose horizontal axis represents time (present time is on the far right) and whose vertical axis represents morphological change. Figure 22.4
- Figure 22.5
Which of the following is evidence for allopatric speciation by the formation of the Isthmus of Panama?

A) One species of the sister species lives on the Pacific side.
B) Genetic analyses indicate time of origin.
C) Sister species diverge first.
D) Coordination of geological evidence demonstrated species divergence.