Which of these best summarizes the Monroe Doctrine? F The immigration of Europeans to the United States must be discouraged. G Further colonization of the Americas by European countries is prohibited.
H The power to nullify federal laws is necessary to preserve sovereignty.
J International peace can be maintained without complicated alliances.

G

Explanation:

It still operates today as a fundamental of US foreign policy in Central and South America.

america opposed the axis powers, because they knew that the united states would be targeted during the war. not only that, but germany (which was an axis power) broke the treaty of versailles, and started developing an army, and started attacking and taking over countries. furthermore, japan, which was allied with germany and italy (who both were axis powers) was attacking china, which was a great ally to the united states.

the qing dynasty placed strict limits on foreign merchants' ability to trade in china.