Which statement is true about the new automatic weapons used during world war i? a. they were in short supply and needed to be shared with the allied forces. b. they made it almost impossible to cross land defended by entrenched troops. c. they caused fewer casualties because they often failed to operate correctly. d. they were primarily used when going door to door in villages and cities.

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 and a is the correct anwsers

explanation:

demand is the need and oportunity to buy a given good or service.