Which of the following is NOT an example of a monopoly?

Group of answer choices

A utility (e.g. water, sewer, electricity) provided primarily by one company

In the 1930s, ALCOA (The Aluminum Company of America) controlled most of the bauxite, a key mineral used in making aluminum.

Three firms control the production of a precious gem globally.

The government-run postal service. Patents, Trademarks, and Copyrights...

Group of answer choices

Allow individual innovators to form companies and possess monopoly power for 30 years

Provide limited monopoly power.

Allow innovators to possess monopoly power forever.

Allow innovative firms to achieve monopoly power for one year.