Concept:Personal selling is a direct promotional method where a salesperson interacts with a customer to persuade them to buy.
Sales promotion uses short-term incentives, such as free gifts and samples, to stimulate purchases.
Explanation:The question contrasts personal selling with sales promotion.
Sales promotion typically includes tools like free gifts, samples, contests, and discounts.
Personal selling, however, relies on direct personal interaction between the seller and the buyer.
This interaction enables the salesperson to explain features, answer questions, and convince the customer in real time.
Therefore, the key feature of personal selling is face-to-face communication with customers.
The other options, such as distributing posters or publishing booklets, are forms of advertising or sales promotion, not personal selling.
Answer:A. face-to-face communication with customers