Answer: D. When a federal law enforcement agency helps state police
In a federalist country, concurrent powers are powers that can be found both at the federal and state levels of government. They are powers that can be exercised by the two arms of government that they are given to. The powers can regard infrastructure, political activities, judicial matters, borrowing money, and economic activities such as the collection of taxes. These powers can be executed by both the state and federal governments at the same time and are constitutional in nature.