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【单选题】
现有甲、乙、丙、方案,其功能指数分别为0.24、0.18、0.22、0.36,其成本指数分别为0.288、0.126、0.146、0.422,则最优的方案为( )。
A.
甲
B.
乙
C.
丙
D.
丁
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