A key development that occurred globally during the classical era was: O A. the spread of democratic government.
B. the reduction of overall military conflict.
C. the expansion of cultural exchange through regional trade.
D. the decline in urban populations.

Which of the following is an example of a concurrent power? a. when a group of states work together to regulate interstate commerceb. when a federal law enforcement agency state policec. when a state creates a treaty with a foreign governmentd. when a local government collects taxes on imports