Why did some groups in South America continue to live as Nomads after the development of agriculture?

A: they lived in ecosystems that were not suitable for farming
B: they had no way of learning how to domesticate crops
C: they had more than enough wild plants and animals to thrive on
D: they believed that agriculture was bad for the land

C: they had more than enough wild plants and animals to thrive on

its

1.A
2.C
3.Norti chico,Chavin and moche,Tai.

I shortened the words above but u should know what I mean.