According to the constitution, which of the following powers are reserved for the states? select all that apply.
powers not delegated by the constitution
powers not approved by the constitution
powers not prohibited by the constitution
powers not granted by the constitution

Powers which are reserved for the states need to meet the two following requirments:

The Tenth Amendment to the US Constitution states that "powers not delegated" to the federal goverment wil be exercised by the states. Moreover, this amendment confirms subsequently, that for the states to be able to hold certain powers, those powers cannot be forbidden by the Constitution.

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