Complete Acceptance of the "Marketing Concept" Would Require

Complete acceptance of the "marketing concept" would require:

A) making sure that all departments focus their efforts on satisfying customer needs.
B) having all production, finance, accounting, and personnel managers report directly to the marketing manager.
C) placing less emphasis on profit as the objective of the firm.
D) trying to satisfy the needs of each and every customer.
E) All of the above.