How did the crusades one class of people to become wealthy?

The document shows a personal allowances worksheet. this document is part of a

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.

Why did the whiskey rebellion protest?