5. Chi-Ming is over thirty and still unmarried, and finally think seriously to marry with Miss Cun-Jiao. However, He still hesitated and worried to meet another more lovely lady although Miss Cun-Jiao is very cute. What is the best economic terms that can explain the above discussion:
(A) Economies to scale.
(B) Decreasing marginal returns.
(C) Opportunity cost.
(D) Compare advantages.
(E) Normal profit.
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統計: 尚無統計資料
統計: 尚無統計資料