Monopoly firms face a. downward-sloping demand curves, so they can sell only the specific price-quantity combinations that lie on the demand curve. b. horizontal demand curves, so they can sell only a limited quantity of output at each price. c. horizontal demand curves, so they can sell as much output as they desire at the market price. d. downward-sloping demand curves, so they can sell as much output as they desire at the market price.
Option d (downward..................................market price) would be the right approach.
Explanation:
The monopoly is attributed to the idea that an organization and therefore its distribution channels control one market or business.
Monopolies may be called a social consequence of unlimited access competition and therefore are frequently further used to characterize an organization that had already absolute or relatively close market power.
Other options aren't connected to something like the situation in question. So the above alternative seems to be the right one.