which of the following situations does not indicate that a process being monitored with a control chart should be investigated to see if the process is out of control?

A:  two or more consecutive plots are close to the upper limit if the control chart

B:  a run of 5 more consecutives plots are above the center line of the control chart

C   a series of consecutive plots are evenly distributed close to the center line of the control chart

D:  a series of five or more consecutive plots exhibits an increasing trend towards the upper limit of the control chart

E:  a single plot falls below the lower limit of the control chart