Because Some Companies Have Been Conducting Market Research for Many

Because some companies have been conducting market research for many years on particular markets they are interested in,they understand the characteristics of target customers.For this reason,when should marketing research NOT be undertaken?

A) when the actual costs are less than the forecasted benefits
B) when there is no secondary data in existence to guide the project definition
C) when the perceived costs are the same as the forecasted benefits
D) when the research would be redundant and a waste of money