Why do archaeologists believe that Neanderthals were the first hominins to bury their dead?
A. Flowers and artifacts have been found near Neanderthal skeletons.
B. Carbon dating proves the skeletons are too old to be Homo sapiens.
C. The depth at which the skeletons were found is evidence that graves were dug.
D. Chemical analysis shows a crude form of mummification was used.