Why might some civilizations not have been part of the Neolithic Revolution? A. None of the animals around them could be domesticated.
B. They could not see the smoke signals that carried news of the revolution.
C. They chose to be passive observers. D. They did not need agriculture or food surpluses.​

I’d say C.

A doesn’t make sense, they definitely could’ve domesticated animals in that time.

B doesn’t make sense either, they could’ve easily seen smoke signals, the sky wasn’t filled with them often.

C is just a weird answer. I doubt they were “passive observers” but probably the best answer to the question.

D doesn’t add up because they definitely needed agriculture/food surpluses. They were always hunting, they obviously ran out of food rather quickly.

So C is the answer.