獨占問題 - 經濟

在寫題目時遇到兩題分別是成大與中正的考古題

但解答並不相同 所以想請教版友這題解答為何

Q.in the case of pure monopoly:

(A)one firm is the sole producer of a good or service which has no close
substitues

(B)the firm's profit is maximized at the price and output combination where
marginal cost equals marginal revenue

(C)the demand curve is always elastic

(D)A and B only

(E)A,B, and C

成大的解答是A ,中正是E

個人是認為E,麻煩版友了!! thx

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