Australia Has Distinctive Organisms, Such as Egg-Laying Mammals and Pouched

Multiple Choice

Australia has distinctive organisms, such as egg-laying mammals and pouched mammals (marsupials) , because they have:

A) an unusual climate that has triggered natural selection.
B) selective conditions that have been relaxed.
C) been separated and isolated from other land masses for a long period of time.
D) experienced a significantly slower rate of evolutionary change.
E) fewer species of organisms than most continents.