I'm not 100% sure but it could be: Voluntary Exchange takes place between buyers and sellers:
(btw I copied and pasted from the question so I didn't take any content :D)
C. In fifth grade, we all had to memorize it. It's a long list of the Constitution's purposes.
To ensure that all Americans have full access to the internet.
Answer:
He promised to solve the problems caused by WW1, by condemning thosee responsible (Jews and others)
