Probably the most critical 'premise' of the marketing concept is:
1. That its implementation must be a 'total firm' effort, not just the focus of the marketing department
2. That the firm's primary objective should be one of identifying and satisfying customers' needs i.e. the customer should be 'central' to everything the firm does
3. The firm should maintain a profit focus, but the focus should emphasize long-term profitability instead of immediate returns.
4. Firms should target rather finely-defined market segments, rather than try to sell to larger, more diverse markets.
5. All of the above are equally critical.
Answer: 2