a Marketing Information Systems are software packages that can be used bb When using secondary sources, we need to make sure they are acceptablec A challenge for marketing managers today is that there is too much data.d Marketing managers can use predictive models to understand the relations decisions may have in the future.

Question $5(1$ point$)$

Which of the following is a source of error in data collection?a The Researcherb The Respondentc Both of these are sources of errord Neither of these are sources of error