It Is Proposed That Cro-Magnons Were Responsible for the Extinction

It is proposed that Cro-Magnons were responsible for the extinction of many large mammals during the Pleistocene epoch.How could this feat have been accomplished?

A) Cro-Magnon man had an increase in tool technology that enabled them to kill animals from a distance.
B) Cro-Magnon man was the first species of hominid to use fire.This would have increased their success during hunting.
C) Cro-Magnon man was the most efficient bipedal species.They would have been able to run after prey species more efficiently than any of their predecessors.
D) Cro-Magnon man was the first species of hominids to hunt in groups.This would have increased their chance of killing larger animals.