Brianne just started a new position as the marketing manager at a larger firm. After evaluating their marketing efforts, she realized the firm was trying to serve everyone and not doing a good job of serving anyone. Now Brianne needed to convince upper management that the firm should focus more on select customers. This practice is called

A$.$ choosing a value proposition

B$.$ marketing myopia

C$.$ building exchange relationships

D$.$ the marketing concept

E$.$ target marketing