The correct answer is B: Immigration was based on the national origins quota system. The National Origins Act was a United States federal law that set the amount of immigrants from certain countries that were allowed to enter the U.S. Admission to the U.S was determined by ethnic identity and national origin. It reduced the number of southern and eastern Europeans and excluded Asians entering the country.
Answer:
Terrorism is using violence or the threat of violence against civilians for political goals. It has been used in the 21st century against a number of countries. Some examples of terrorism are the 9/11 attacks in America, and an attack in Paris as well, and that's just a few of the attacks. There has been a 61% increase in terrorist attacks in the past year.
Answer:
union leaders negotiating on behalf of a group of workers
Steps the allies took toward planning for the postwar era
By forming various organizations.
The European Union, for example, unites Europe (Minus Britain these days) under one banner, thus preventing fighting.
A more direct example is the North Atlantic Treaty Organization. NATO protects the "North Atlantic" and Europe from terrorists and invading countries by using the combined military strength of multiple nations.