One reason is because the republicans feared immigrants who would support the Federalists future elections.
Another reason is that the Antifederalists wanted to gain more members so they passed the act in order to welcome those entering the country.
Monarchs were able to crush most rebellions, and people won few new rights
The correct answer is prevent communism from spreading to any additional territories.
The Cold War was an time period in which the United States and Soviet Union competed for global influence and power. At this time, the US was worried about the spreading of the Soviet Union and their power due to their communism system. The federal government felt that communism restricted individuals civil liberties and economic freedoms. This is why the US adpoted the policy of containment.
Containment was focused on stopping the spread of communism to other countries and territories around the world.
It was signed on June 28, 1919, by the Allied and associated powers and by Germany in the Hall of Mirrors in the Palace of Versailles and went into effect on January 10, 1920.