Concept:The marketing concept is a business philosophy that places the customer at the heart of all activities.
Its main aim is to satisfy customer needs while earning a profit for the organisation.
Explanation:Under the marketing concept, a firm first identifies what customers want and need.
Then it designs, produces, and delivers products or services that meet those needs effectively.
The ultimate focus is on customer satisfaction, but it must be achieved profitably.
This idea is broader than simply selling or pushing goods on customers.
Option A stresses direct selling, which ignores the customer’s needs.
Option B talks only about promotion to increase sales, not real satisfaction.
Option C focuses on mass production, which is about output rather than the customer.
Only option D correctly states that the marketing concept emphasises consumer’s satisfaction at a profit.
Therefore, the business succeeds when customers are happy and the company still earns a sustainable profit.
Answer:D. consumer's satisfaction at a profit