A similarity between monopoly and monopolistic competition is that in both market structures a. there are only a few buyers but many sellers. b. there are a small number of sellers. c. sellers are price makers rather than price takers. d. strategic interactions among sellers are important.

c

Explanation:

A monopolistic competition is when there are many firms selling differentiated products in an industry. A monopolistic competition has characteristics of both a monopoly and a perfect competition. the demand curve is downward sloping. it sets the price for its goods and services.

An example of monopolistic competition are restaurants  

When firms are earning positive economic profit, in the long run, firms enter into the industry. This drives economic profit to zero

If firms are earning negative economic profit, in the long run, firms leave the industry.  This drives economic profit to zero

in the long run, only normal profit is earned

A monopoly is when there is only one firm operating in an industry. there are usually high barriers to entry of firms. the demand curve is downward sloping. it sets the price for its goods and services.

An example of a monopoly is a utility company

A price maker is a seller that sets the price for its goods and services. A monopoly and a monopolistic competition are price makers

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