BRAINLIEST IF ANSWERED Briefly explain ONE example of a cultural exchange before the arrival of the europeans, affected the cultural development of an American Indian Group

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.

I’m pretty sure the answer is a