A Major Airline Is Interested in Monitoring Customer Satisfaction with Its

A major airline is interested in monitoring customer satisfaction with its baggage handling process. To do so, each day the airline randomly selects 100 customers and surveys them to determine if they are satisfied or not with the service provided. After 20 samples, a total of 260 unsatisfied customers were counted. The appropriate control chart for these data is the

A) p chart.
B) x-bar chart.
C) R chart or S-bar chart.
D) c chart.
E) R chart.