Marvin Is Looking for Data to Help Him with a New

Marvin is looking for data to help him with a new marketing research study assigned to him.When reviewing existing secondary data from a past research study,Marvin should pay careful attention to

A) how the secondary data were collected.
B) where the data were warehoused.
C) whether or not the Census Bureau has certified the research.
D) whether the data were transformed into information.
E) how often primary data were substituted for secondary data.