Which of These Best Describes the Australian Mimis and Kangaroo

Which of these best describes the Australian Mimis and kangaroo rock art?

A) they were done by Paleolithic hunter-gatherers,probably to amuse and entertain themselves and each other
B) they are layered images,done many years apart,with the kangaroos on the top layer executed in the X-ray style.
C) they are images of common men performing everyday tasks
D) none of the above