30. The copper, aluminum, cement, and industrial alcohol industries are examples of: a. interproduct competition. b. homogeneous oligopoly. c. monopolistic competition. d. differentiated oligopoly.

30. The copper, aluminum, cement, and industrial alcohol industries are examples of:
a. interproduct competition.
b. homogeneous oligopoly.
c. monopolistic competition.
d. differentiated oligopoly.

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