Concept:The principle that the consumer is king and must be satisfied is the foundation of the marketing concept.
Explanation:Marketing research is the process of gathering data about customers and markets.
Consumerism is a movement aimed at protecting buyers from unfair trade practices.
Advertising is a promotional tool used to inform and persuade customers.
But the marketing concept is a business philosophy that makes the customer the centre of all decisions.
Under this concept, every activity of the organisation is directed toward identifying and satisfying the needs, wants, and expectations of consumers better than competitors.
Therefore, when an organisation sees the consumer as the “king” who must be satisfied, its main emphasis is on the marketing concept.
Answer:B. marketing concept