In an Example of How Microscopic Evidence in Studying the Past

In an example of how microscopic evidence in studying the past can yield surprising results that may overturn long-held assumptions,Williamson's analysis of microscopic residues stuck to the edges of cutting tools found at a cave site in South Africa revealed that

A) 50 percent of the residues were from plants, contradicting the prevailing assumption that such tools were used mainly to hunt and butcher animals.
B) all of the residues were from butchered animals, but most of the butchering had been performed by women and not by men.
C) 30 percent of the residues were from plants, suggesting a slow transition from vegetarian to carnivorous diets.
D) 50 percent of the residues were from domesticated plants, pushing back the date of plant domestication from 10,000 to 40,000 years ago.
E) 30 percent of the residues were from human flesh, suggesting cannibalism.

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