Final answer:
Suggesting additional items to a guest's order is known as suggestive selling, which is a technique used to enhance the customer's experience and boost business sales. option c.
Step-by-step explanation:
Suggesting additional items to a guest's order is known as suggestive selling. This sales technique involves recommending additional products or services to customers based on their current selections, with the intent to enhance their experience and increase the sales of the business. This sales technique involves recommending additional products or services to customers based on their current selections. For example, a server at a restaurant might use suggestive selling by recommending a side dish or dessert that pairs well with the entrée the customer has ordered.