Charlemagne was important because

a. he stopped the spread of island into spain
b. his invasion of england made it a french colony.
c. he stablished a relatively unified empire in medieval europe.
d. the catholic church was unable to control his political actions.

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.