Which of the following are examples of secondary data (as contrasted with primary data)?
A. Results of an experiment used to evaluate advertisement effectiveness for a new product.
B. Consumer attitudes as measured by an attitude questionnaire designed and used by a researcher investigating a model of consumer behavior.
C.Housing data especially collected from a sample by a researcher working on a project for a construction company.
D.Demographic information (birth, age, marriage, income, etc.) collected from a sample of respondents as a part of a market segmentation study for a prominent grocery chain.
E. Housing data (tenure, race of occupants, year built, etc.) as reported in the Journal of Marketing and later used by a researcher working on a project for a construction company.