Slavery was legal in america for approximately years. a. 100 years b. 200 years c. 250 years d. 300 years select the best answer from the choices provided a b c d

The right answer is C.

Explanation:

I entered in B. 200 but it was marked wrong and said that C. 250 was the right answer.

the answer is 250 percent.

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.