The evidence that proves Neanderthal tools were more complex than previous tool-making efforts was the attaching of stone tools to shafts to create spears. Hence, the correct option is (C).
Neanderthals were the first ancient humans to have bone structures and anatomy similar to modern humans or Homo Sapiens. Neanderthals lived about 40,000 years ago and developed complex ways of making tools. To make tools, they started using stone and bones. In addition, Neanderthals also started using fire to cook their food. The tools made by Neanderthals also began to be more complex than other ancient humans because they had started attaching the stone to shafts to create spears.
Learn more about the Neanderthal at https://brainly.com/question/27368160
#SPJ4