Sandra is in the market for a new PC computer. She plans to go online to Dell's website, visit her local Best Buy and Walmart store locations, and even see if she can find options on Amazon. She is able to shop around for the best product and price to meet her needs, since most computer manufacturers use :

selective distribution

Explanation:

In marketing, the selective distribution approach refers to a company only choosing a few retail stores or distributors to sell their products to final consumers. It is the opposite to mass marketing where a company will seek all the possible outlets where it can sell its products.

Selective distribution is not the same as exclusive, because when you use exclusive distribution only one retailer can sell your products, instead selective means a few selected retailers can do it.