Answer:
Agriculture arose in North America (and western hemisphere more generally) nearly simultaneously as in Asia/eastern hemisphere.
Step-by-step explanation:
A is not correct because the agriculture in both hemispheres developed almost at the same time.
B is not correct simply because if that was the case there wouldn't have been any developed and complex civilizations in the western hemisphere.
C is correct because the agriculture developed at approximately the same time in both hemispheres, independently from each other, with different crops, with the difference being that in the eastern hemisphere it was much more common than in the western hemisphere over time.
D is not correct because the ice age was still not ended at that time, so agriculture wouldn't have been a possibility, or it would have been too limited and way too hard.