According to paragraph 5, Lesley Maynard made which of the following suggestions about Australian rock art? A. There were a pattern of human figures being represented in a more complex style than animal figures. B. Australian archaeology should concentrate on determining the sequence of styles that led up to the Panaramitee style. C. The great antiquity of Australian rock art would probably make it impossible to determine the ages of the various styles found in rock art. D. The geometric style of Australian rock art was replaced by increasingly complex figurative styles.