Which of the Following Was the Key Characteristic of Early

Which of the following was the key characteristic of early humans that allowed them to effectively out-compete other species?

A) Color vision allowed for the detection of ripe fruit and game.
B) Mastery of fire allowed for provision of warmth in shelters.
C) Agile hands allowed for the creation and use of tools.
D) Mastery of fire allowed food to be cooked.
E) A larger brain allowed for more complicated behavior.