Amonopoly is a market sifucture that is characterized by

A$.$ a single seller of a good of service that has many close subsilutes.

$8.$ many sellers seiling differentialed produets.

C$.$ a single seller of a good of serviee that does not have a slose subelitute.

None of the above.

Using the broader definition of monopoly, in which of the following cases could we argue ihat Micosof has a monopoly in computer operating systems?

A$.$ If Microsoft charged prices similar to those that Apple and Linux charge for their operaling systems in order to compete.

B$.$ If there are no bartiers to enity in the market for computer operaling systems.

c$.$ If Apple and Linux started to produce operating sysiems similar to Windows.

D$.$ II Apple's computer operating system and the Linuk operating system were not considered close subsifutes for Winders: