Answer: is Option D: All of the above are reasons to need information provided by marketing research.
Explanation:
Marketing managers needs information based on the marketing research for betterment of the firm and its productivity. Through marketing research managers assess their current scope of the firm among consumers by calculating many factors. These includes firm's scope and its recognition nationally as well as internationally, consumers affiliation with the product produced by the firm, and to gather the information regarding its competitors. so the right option is D.