What is a monopoly?
A. A monopoly is a free market economic system.
B. A monopoly encourages free trade between nations.
C. A monopoly controls the supply within a specific market.
D. A monopoly establishes laws for buying goods and services.

C

Explanation:

monopolies are more harmful than beneficial because they stop the ability for competition. Competition gives the consumer more choice to choose what to buy but a monopoly makes only one product available.

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!

b.unemployment reached nearly 25 percent.