Concept:Sampling means testing a new product in a small part of the market to observe consumer reaction.Explanation:When a company takes a new product to a particular part of the country, it is conducting product sampling.This helps the business gather consumers' opinions and reactions before a full national launch.It is cheaper and safer than introducing the product everywhere at once.Sales promotion and advertising aim to increase sales and awareness, not to test reaction.Merchandising focuses on displaying products in shops, not on testing consumers.Answer:B. sampling