Which 2 regions would most ancient Chinese have lived in?

Idk, but try searching it up •_•

Ithink the answer is c. hope i . have a good day

The  most important advantage  of  northeast china  that  mainly contributed toward its being  the  industrialand  technological center  of the  country  in the  1970s  and  1980s  is:   its  juxtaposition with china's  most important industrial  neighbors.