Which statement about reserved powers is accurate

I think you forgot to give the statements to choose from. I will still answer the question and hope that it helps you. The statement about reserved powers that is accurate is that these are the powers of the state alone and are stated under the 10th amendment of the United states Constitution. The head of the state can execute such powers without requiring any permission from other branches of the government.

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.