Final answer:
The importance to marketing managers of growing ethnic markets lies in the profit incentive to sell to everyone, the need to expand a business's workforce, and the potential loss of profits from refusing to sell to minorities.
Step-by-step explanation:
Firms have a profit incentive to sell to everyone, regardless of race, ethnicity, religion, or gender. A business that needs to hire workers to expand may also find that if it draws only from its accustomed pool of workers-say, white men-it lacks the workers it needs to expand production. Such a business would have an incentive to hire more women and minorities. Additionally, if a business is located in an area with a large minority population and refuses to sell to minorities, it will cut into its own profits. These factors highlight the importance to marketing managers of growing ethnic markets.