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

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.

b. the passage of the equal rights amendment  

explanation:

this mean that anything that someone else could do they could do

chamberlains goal was to stop the uk ad germany from fighting which he went to hitler and asked if he could sign a peace treaty between germany and the uk