The Central Line on a P-Chart Is 0

Multiple Choice

The central line on a p-chart is 0.50 with a UCL of 0.65 and an LCL of 0.35.The results of the next six samples are 0.60,0.37,0.45,0.48,0.45,and 0.42.What should you do?

A) Nothing;the process is behaving as expected.
B) Explore the assignable causes because three observations are above the central line.
C) Explore assignable causes because there is a run.
D) Increase the sample size to get a better measure.