C
It is C because no state can do something to someone else or something without seeking federal help. This is common especially for federal things like buildings.
This quote means that if you choose the job of your dream, you won't feel like your working, it feels like a fun dream your whole life.
This is optimistic because it is saying that if you do what you love you'll be happy.
It will make people want to choose the best job for them so that they can do what they want their whole life!
D there was a lot of civil unrest due to face
B) They forced the tribes to move to other areas