I think the best answer from the choices listed is "C"....
Answer:
Usually, to the best of their abilities.
Explanation:
U.s got its independence from great Britain
1. Missouri Compromise (allowed slavery in Missouri)
2. Kansas-Nebraska Act (made Kansas a territory free do decide on slavery)
3. Dred Scott (made black people property)
4. Fugitive Slave Act (forced north to cooperate with slave owners)
5. Bleeding Kansas (Missouri pro-slavery men invaded and terrorized Kansas to force slavery)
Missouri compromise was the beginning were it all started.
Answer: vassals.
Explanation: A king (or lord) ruled large areas of land. To protect his land from invasion, the king gave parts of it to local lords, who were called vassals.