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 ③Inspection④Flow chart⑤Work Breakdown Structure  ⑥Pareto chart
A.①③⑤
B.①②④⑥            
C.②③④⑤⑥
D.①②③④⑥