The berlin wall was built by the east germans and the soviet union to stop trade between east and west berlin force the western allies to give up their occupation zones in berlin stop the flood of refugees leaving east germany for the west via west berlin prevent east germans from coming to east berlin

the correct answer is "c: merchants" and "e. soldiers".

the song dynasty was known as the first government in the world to introduce paper currency. it was also the first chinese government which established a permanent standing navy. finally, the first compass was introduced during this period of government.

all of these innovations heavily affected commerce in a positive way. printed money dynamize commerce within the borders of the empire due to an easier way to quantify value during the trade. the introduction of the compass trade routes to be faster. finally, the introduction of a standing navy regulate trade routes.

regarding military affairs, gunpowder was created during this period. this was a tremendous improvement that was widely utilized by the military in order to innovate in the manufacturing of weapons.

d.

the northwest territory became the most densely populated area in the u.s.