The region between Siberia and Alaska, thought to have been up to 600 miles wide, and that existed during the Ice Age is known as...? A. Trans Siberian region

B. Beringia

C. The Intercontinental Region

I'm not 100 percent sure i say 7 is your answers

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.