Who can utilize the power of initiative and referendum in Arizona?

In Arizona, the power of initiative and referendum is primarily designed for use by the citizens, specifically registered voters. This process allows residents to propose new laws (initiative) or to challenge existing laws (referendum) through a direct vote.

The ability for both citizens and elected officials to engage in these processes can be understood in terms of the roles they play. Citizens, as registered voters, have the fundamental right to propose initiatives and vote on referendums, thus directly influencing legislation and governance. While elected officials can support or advocate for initiatives and referendums, the actual power lies with the citizens to propose and decide on these measures through a voting process.

The recognition that both groups can play a role in the initiative and referendum process speaks to the collaborative nature of democracy in Arizona, where both the electorate and their representatives can affect policy, though the fundamental power to initiate or reject legislation rests with the voters themselves. Therefore, the correct answer reflects this dual involvement in the process.