Plots of sample ranges indicate that the most recent value is below the lower control limit$.$ What course of action would you recommend?

Question $22$ options:

Since there is no obvious pattern in the measurements, variability is in control.

The process is not out of control.

Lower than expected dispersion is a desirable condition; there is no reason to investigate.

Variation is not in control; investigate what created this condition.

One value outside the control limits is insufficient to warrant any action.