Which of the following is not pre-sale service?

This question tests the distinction between pre-sale services, which happen before a purchase is completed, and after-sale (post-sale) services, which happen once the customer already owns the product.

Pre-sale services are activities carried out to help a customer decide whether to buy something and to prepare the product for sale. Demonstrating how a product works, providing detailed information about the goods, and setting up storage facilities so items are ready and available for customers to inspect and buy are all things that happen before a purchase is made.

Repair and maintenance work is different: it is carried out on a product that a customer has already bought and is now using, to keep it functioning properly or to fix a fault. Because it takes place after ownership has changed hands, repair and maintenance work is an after-sale service, not a pre-sale service, which makes it the option that does not belong with the other three.

When classifying a customer service activity, ask whether it happens before the customer commits to buying (pre-sale) or after the customer already owns the product (after-sale); repair and maintenance always falls into the after-sale category.