The marketing manager is considering a new advertising campaign for Guzzle Beverages. He purchases six months of scanner data for Cruncheez Snack Foods, a company that recently ran a similar campaign. He wants to use this information to determine their campaigns effectiveness before implementing it for Guzzle. He is using _________ to research his problem and make an informed decision.
A. Surveys
B. Interviews
C. Government Sources
D. Secondary Data
E. Primary Data
Answer: D. Secondary Data