A Local Advertising Company Wanted to Find Out What Radio

Multiple Choice

A local advertising company wanted to find out what radio station people listened to most often. So they asked various car washing companies to record what was listed as the first preset station on the radios of the cars they were servicing. This observation would be considered

A) an independent variable
B) a measure of reaction time
C) a source of bias
D) an unobtrusive measure
E) a case study