which of these is the best example of a follow up in the selling process

A presentation of a new product to a retailer
An in-store demonstration
A transaction at a cash register
A thank you card to a recent customer with a discount coupon

A thank you card to a recent customer with a discount coupon is the best example of a follow up in the selling process. This shows appreciation for the customer's purchase and encourages them to return by providing a discount coupon for their next purchase. It helps to build a positive relationship with the customer and can increase the likelihood of repeat business.