A cell phone company conducted a survey to determine if customers were
with their cell phone service. The survey sample consisted of all customers
contacted the company within the past year and who agreed to participate. Of the
customers surveyed, 65% reported that they were not satisfied with their service.

Which statement about this sample is true?

A. Exactly 65% of all customers are not satisfied with the cell phone service

B. The sample includes all customers who made complaints to the company within the last year and therefore is representative of the population

C. The sample might not be representative of the population because, in general satisfied customers have no reason to contact the company

D. No generalizations can be made from this sample because the sample size is too small