单选题 Perform Quality Control is the process of monitoring and recording results of executing the Quality Plan activities to assess performance and recommend necessary changes. ______ are the techniques and tools in performing quality control.
①Activity network diagram
②Cause and effect diagrams
③Inspection
④Flow chart
⑤Work Breakdown Structure
⑥Pareto chart
【正确答案】 D
【答案解析】[解析] 执行质量控制是一个监督、评价项目质量计划活动执行结果和提出变更请求的过程。执行质量控制的技术和工具包括：活动网络图(Activity networlk diagram)、因果图(Cause and effect diagrams)、检查(Inspection)、流程图(Flow chart)和帕累托图(Pareto chart)等，但不包括工作分解结构(Work Breakdown Structure)。