Who was sacagawea?
a. a leader.
b. a shoper.
c. a precher.
d. a techer.

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.