One of the important advantages of using control charts in managing a production operation is that the control chart tells you when to take corrective action on the process being controlled. Another important result of using control charts is:

Answer is B:

One of the most important things in using control charts is that they not only show when the process is out of control but also show when the process is in control and only normal variations are taking place. This means that we have a guide that tells us when we should not be taking corrective action as well as a guide to tell us when we should take corrective action.

Option B is the correct in my opinion 

c. The control chart shows how much the defects are costing

thanks for invition ,,,,,,,,,, my choice is option C

1) Risk Assessment

2) Lesson Learning Education.

3) Minimise the Natural Calamity.

I think c is the appropriate answer.

Thanks for the inv.

Control chart identifies the special causes. Hence A is the right answer