How did a new political party affect the challenges to slavery ?

What does this quotation from the introduction of thedeclaration of independence do?

What was included in most state constitutions that guaranteed protection of individual liberties based upon common law?

How has the elimination of trade barriers affected the movement of goods among member countries of the european union? a. member countries are able to produce all the goods they need. b. goods can move freely among member countries. c. member countries no longer need to trade with countries outside the eu. d. larger countries are able to import more goods than smaller ones.