Speciation has definitely occurred when two groups of related organisms

A.Cannot interbreed successfully

BHave Drastically different behaviors
CHave Drastically different behaviors
Dbecome permanently isolated from each other

Verified Answer :

cannot interbreed successfully.

Bistai

The right option is; A. Cannot interbreed successfully

Speciation is a process within evolution in which new distinct species that are reproductively isolated from one another are formed. Speciation involves the disintegration of a single parent species into two or more genetically distinct species. During the process of speciation, species may not be able to interbreed successfully due to behavioral, genetic, or physical differences that arise between the new species.