Historically, the Average Proportion of Defective Bars Has Been 0

Multiple Choice

Historically, the average proportion of defective bars has been 0.015.Samples of 100 bars each are taken.Construct a p-chart using z = 3.Suppose a sample had 0.044 defectives.What would you do?

A) Nothing; it appears to be random variation.
B) Look for assignable causes.
C) Delete the sample with 0.044 defects and take another sample that is better.
D) None of these choices