Which Statement Best Describes the Idea of Marketing

Which statement best describes the idea of marketing?

A) The marketing concept emphasizes creating and maintaining short-term successful relationships with customers and suppliers.
B) Marketing encompasses such a broad scope of activities and ideas that settling on one definition is often difficult.
C) Marketing refers to an activity in which two or more parties give something of value to each other to satisfy perceived needs.
D) The marketing concept is a belief that consumers will resist purchasing nonessential goods and services.