Answer:
The correct answer is: b. marsupials were better adapted to the climatic conditions of Australia than were eutherians.
Explanation:
Continents moved according to the tectonic plates and continental drift causing climate change, warmer to the places nearer the equator and colder to the places closer to the poles. Reason why some of the species survived better in certain circumstances regarding the weather as it was the case of the marsupials in Australia. Once continents got separated from the Pangea (One only continent) Species of animals and plants were separated too, a sample of this information has been proved with the findings of same species fossils in different places around the world.