Which of the Following Research Scenarios Are Examples of the Observation

Multiple Choice

Which of the following research scenarios are examples of the observation method?

A) A car dealer checking which radio stations cars are tuned to when they're brought in for service to know which stations to advertise on
B) Recording license plate information in a shopping mall parking lot to learn where shoppers are coming from
C) The use of different colored promotional flyers mailed to different zip codes to identify which trading area a retailer is serving
D) Studying scuff marks on tiles at a museum as a means of measuring the popularity of a display
E) All of these are examples of observational research methods.