What Type of Research Design Should a Marketing Researcher Use

Multiple Choice

What type of research design should a marketing researcher use to find out how many customers there are,what brands they buy and in what quantities,which advertisements they recall,what are their attitudes toward the company,where do they buy,when do they buy,and who is the competition?

A) Exploratory research
B) Causal research
C) Basic research
D) Descriptive research
E) None of the above.