【单选题】
A 为未计划的项目范围和成本变更而储备的预算 Budget reserved for unplanned changes to project scope and cost
B 为掩盖较差的业绩而储备的预算 Budget reserved for covering poor performance
C 为未计划但是可能由于风险登记册中登记风险成真而潜在要求的变更而储备的预算 Budget reserved for unplanned but potential required changes that can result from realized risks identified in the risk register
D 为支付批准变更所产生的超支费用而储备的预算 Budget reserved for covering cost overrun due to approved changes
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