Which of the following are considered categories of power companies?

The correct choice identifies distinct categories of power companies that reflect the various organizational structures within the energy sector. Municipalities are local government entities that provide electricity to their communities. Rural Electric Cooperatives are member-owned utilities established to provide power in rural areas where traditional utilities might not operate efficiently. Investor Owned Utilities (IOUs) are private companies that offer electrical services to the public while earning a return on investment for their shareholders. Public Utility Districts (PUDs) are local governmental agencies authorized to provide utility services to the public.

These categories are accurately representative of the types of entities involved in the production and distribution of electricity, emphasizing the mix of public and private providers and how they serve different communities and sectors.

Other choices include entities that may not fit or represent typical categories of power companies as recognized within the industry or mix different types that do not accurately reflect established classifications.