Marsupials Survived in Australia (As Opposed to Asia) Because ________

Marsupials survived in Australia (as opposed to Asia) because ________.

A) marsupials were better adapted to the climatic conditions of Australia than were eutherians
B) marsupials were, and are, better competitors than eutherians
C) Australia had separated from Pangea, and eutherians were not able to invade Australia
D) continental drift, caused by plate tectonic processes, allowed eutherians to invade Asia and the Americas