The main difference between Ellis Island and Angel Island was that the majority of the immigrants that traveled through Angel Island were from Asian countries, such as China, Japan, and India. ... The Chinese were targeted due to the large influx of immigrants that were arriving in the United States.
All are possible except for C)
I would go with B) alot of build up for this.
The Monroe Doctrine was an effort to stop Europeans from influencing politics within the United States. (Lets say if Russia tried to turn the U.S communist during the cold war. The Monroe Doctrine would take into effect)
Russia's Communist government tried to improve food production by "<span>b. taking over ownership of farms," since this was part of their centrally planned economy (which ultimately failed).</span>
