Which statements are correct? (More than one answer is true.)

Which statements are correct? (More than one answer is true.)
A . You use control charts to control or monitor one or more processes. In the task list characteristics, you use the SPC criterion to define these processes are to be combined or separated from one another (which inspection lots refer to a common control chart).
B . The SPC criterion controls how processes are combined or separated for a control chart (that is which inspection lots refer to a common control chart).
C . You make the preparations for a control chart in the sampling procedure and the task list or master inspection characteristic.
D . You cannot use the control chart to valuate inspection results. If an appropriate valuation rule is used, a sample can be rejected if at least one of the action limits in the related control chart is exceeded.

Answer: ABC