Which of the Following Would Be a Source of Secondary

Which of the following would be a source of secondary data in a marketing research study being done by a producer of bottled water?

A) a safety report prepared by the FDA on the bacteria content of drinking water
B) interviews with people who commonly use bottled water
C) observational research on how people act around a water cooler
D) a telephone survey to athletes who typically consume a lot of water
E) all of the above