Question

Using the CAT-scan technique on an Australopithecus africanus skull known as "Mrs Ples," from Sterkfontein, South Africa, Frans Zonnevold and Jan Wind determined that, based on the semicircular inner ear canals, "Mrs Ples"
a) walked with her head at a similar angle to that of modern humans, implying a similar capacity for bipedalism
b) walked with her head at a greater forward sloping angle than modern humans, implying mixed tree-climbing with bipedalism
c) walked with her head at a forward sloping angle more like that of chimpanzees, implying almost exclusive tree-climbing
d) walked with her head at a greater forward sloping angle than modern humans, implying a severe deformity of the cranial vault
e) none of the above

Answer

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