How did islam spread through north africa and asia

What role did radio free europe play in western countries' cold warstrategy?

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.

Population parameters are difficult to calculate due to