Final answer:
The selling concept is the idea that consumers will not buy enough of the firm's products unless the firm undertakes a large-scale selling and promotion effort. This concept focuses on aggressive selling and promotion activities to persuade customers to purchase the firm's products.
Step-by-step explanation:
The selling concept is described as option a. The idea that consumers will not buy enough of the firm's products unless the firm undertakes a large-scale selling and promotion effort. This concept focuses on aggressive selling and promotion activities to persuade customers to purchase the firm's products. It assumes that customers need to be convinced to buy the products rather than naturally preferring them.
For example, a company may run extensive advertising campaigns, offer discounts, or use personal selling techniques to persuade customers to buy their products.