[单选题]下列概念中属于合同法的协作履行原则具体体现的是（ ）
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2023-09-20 00:45:52|
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[单选题]下列概念中属于合同法的协作履行原则具体体现的是（ ）
A.债务人可选择最经济合理的运输方式
B.债务人履行债务时，债权人应提供必要的条件和方便
C.在情事变更的情况下可变更合同
D.履行主体应适当
A.债务人可选择最经济合理的运输方式
B.债务人履行债务时，债权人应提供必要的条件和方便
C.在情事变更的情况下可变更合同
D.履行主体应适当
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