【单选题】
A <{p data-we-empty-p="" _msthash="20502" _msttexthash="25754443"}>变动性制造费用<{/p}>
B <{p data-we-empty-p="" _msthash="20503" _msttexthash="26065585"}>固定性制造费用<{/p}>
C <{p}><{font _mstmutation="1" _msthash="20497" _msttexthash="11791299"}>沉没成本<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msthash="20501" _msttexthash="10746554"}>差别成本<{/font}><{br/}><{/p}>
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