1. The rulers who came to power after Charlemagne failed to defend the empire.
2. Europe was threatened by Muslims, Magyars, and Vikings in the 9th and 10th centuries.
Answer: c. the economic freedom rating of the United States fell and the growth of real GDP was less rapid than that of recent decades.
Explanation: The economic freedom rating of the United States in the first decade of the 21st century fell below the what was obtainable in the previous decade. Likewise, the growth of real GDP during this period was less rapid than it was previously
It banned slavery in the northwest territory
