Why Does Non-Human Primate Cooperation Fall Short of the Standards

Why does non-human primate cooperation fall short of the standards for full or true cooperation, as humans practice it?

A) Non-human primate cooperation is generally more selfless or altruistic than human cooperation.
B) Non-human primate cooperation is generally pragmatic; they do it only because there is safety in numbers.
C) Non-human primates divvy up jobs and rotate though roles instead of everyone doing the same thing, like a human hunting party.
D) Humans will look to see where other humans are looking and non-human primates don't do that.
E) All of the answers are correct.