What caused the western roman empire to fall apart? a. the barbarian invasion b. the feudal system c. the crusades

The barbarians caused the downfall of the Western Roman Empire.

Explanation:

The barbarians had pressured the Romans for over hundreds of years, especially those in Gaul, today known as France. Over time, these barbarians continued to sack Rome, kill people and light cities on fire.  

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.

a woodchuck would chuck 12.5 wood : 3