Isotope Analysis of Australopithecus Teeth Suggests That These Hominins Ate

Multiple Choice

Isotope analysis of Australopithecus teeth suggests that these hominins ate

A) C₃ plants, probably including forest fruits and leaves.
B) primarily C₄ plants, suggesting that most Australopithecus lived in open grassland.
C) mostly C₃ plants early on, shifting to mostly C₄ plants over time.
D) an even mixture of C₃ and C₄ plants, suggesting no change in diet for millions of years.