Answer:
the answer would be B: American patriotism to support the war effort.
The term you're describing is p<span>rotectorate. These nations do have their own government but don't have a good enough military to defend themselves. They rely on stronger countries to help them in time of war.</span>
Its sort of like a custom.Its not really written down and there is no legal punishment, but if you disobey the custom you will in some way be shunned or punished by the people who follow that custom.