In order to stop the spread of Communism, the United States followed the policy of containment.
The lord would provide to the vassal land from which they could make money from and in return the vassal would contribute troops to the lords army. Sometimes vassals would also pay a small fee of grain or various other goods as a sort of tax for the land.
Richard J. Daley: hope it helps :)
The correct answer to this is likely B.
A supporter of Citizens United would likely argue that corporations are citizens have speech rights and that money is speech.