24. The MR = MC rule: a. applies only to pure competition. b. applies only to pure monopoly. c. does not apply to pure monopoly because price exceeds marginal revenue. d. applies both to pure monopoly and pure competition.

24. The MR = MC rule:
a. applies only to pure competition.
b. applies only to pure monopoly.
c. does not apply to pure monopoly because price exceeds marginal revenue.
d. applies both to pure monopoly and pure competition.

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