Natural Springs Inc. is a company that sells packaged drinking water. The CEO of the company, Naji Huang, wants consumers to associate the company with purity and health. He conveys his message to his board of directors saying that the company should not only focus on selling water bottles but also on valuereating activities such as using an environment$-$friendly process. Naji's vision represents a

a$.$ marketing strategy

b$.$ product differentiation

c$.$ contingency plan

d$.$ corporate strategy