What does geographic isolation lead to?

A. Ecological specialization


B. Adaptive radiation


C. Reproductive isolation


D. Increased species diversity


E. Sexual selectionWhat does geographic isolation lead to?
A.What does geographic isolation lead to?
I could see more than one of these answers being correct. Isolation may lead to ecological specialization, but not necessarily. I believe reproductive isolation is the best answer. Increased species diversity may be a possible outcome when viewing both the isolated and original populations as a whole, but diversity within the isolated group is likely to decrease.
C--Reproductive Isolation, which leads to speciation.
C and speciation
Australia - best example. So you figure it out form there.
A, C, or A and C. :)