What was the purpose of the Monroe Doctrine?
O It was a treaty for the United States to buy land.
O It increased trade with other nations in Europe and Asia.
It warned European nations to stay away from Western nations.
It was a policy to increase the size of the U. S. military.

Right choice is:

It warned European nations to stay away from Western nations.

Explanation:

The Monroe Doctrine is a concept that sees any intervention of extrarregional powers (mainly of Europe in 1823) in the affairs of the nations of the Western Hemisphere as a threat to the United States´ security. It also states that the US would not intervene in the conflicts or issues of the European powers.

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.

it increased the power of the king of england.