Which of the following is an example of an out-of-state electricity supplier?

An out-of-state electricity supplier is a utility company that provides electricity services in a different state from where it is headquartered or primarily operates. Duke Energy is an example of this because it operates in several states, including North Carolina and South Carolina, while being headquartered in Charlotte, North Carolina.

In contrast, Pacific Gas and Electric and Southern California Edison are based in California and primarily serve that state. Similarly, Entergy operates in multiple states in the southeastern U.S., but its primary markets are concentrated in the Gulf Coast region. Therefore, Duke Energy stands out as the correct example of an out-of-state electricity supplier in this scenario, as its services and operations extend beyond a single state to several regions.