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.
1.Activity network diagram         2.Cause and effect diagrams             
3.Inspection                                 4.Flow chart
5.Work Breakdown Structure    6.Pareto chart                 

A. 1.3.5.
B. 2.4.5.6.         
C. 2.3.4.5.6.
D. 1.2.3.4.6.