All of the following are ways to collect useful marketing research information except a. buying from commercial or govemmental data sources.
O b. conducting telephone polls.
c. conducting personal interviews.
d. sending questionnaires by mail.
O e impulsively stopping persons on the street to inquire about their buying habits.

impulsively stopping persons on the street to inquire about their buying habits

Explanation:

For businesses which are to be started, conducting marketing research can help the business know the products that would generate profits while for existing businesses, market research help companies to determine if their customers are satisfied with their services. Ways of conducting market research are:

Using information from commercial or governmental data sources may not be reliable because it may be outdated.

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