During the tang and song dynasties what was the best way to move goods? A. By land
B. by river
C. By air

Why is it economically necessary for the east germans to build berlin wall

This cartoon appeared in 1916. the topic of the cartoon isa)the reason for the start of world war i.b)the success of us submarines in world war i.c)the military alliance between germany and mexico.d)the attitude in the us towards submarine warfare in world 

4. write short introduction to aaran and jaanto technology.