Oldowan pebble tools
A. are obviously manufactured stone tools that consist of flakes and cores.
B. include elaborate axes and spears.
C. contain evidence that they were used on fellow hominins, providing the earliest evidence of human warfare and cannibalism.
D. were also used to decorate burial sites, suggesting very early symbolic thought.
E. were found at the same site and stratigraphic layer as the Ardipithecus kadabba fossils, dramatically pushing back in time the onset of stone tool use to the late Miocene.
Answer: A
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