Which of the following is generally attributed with weakening the centralization of the tang government and ultimately leading to the decline of the dynasty boxer rebellion sino-japanese war an lushan rebellion opium war

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