Vitacorp, a manufacturer, wishes to make its information booth at an industry convention more productive in terms of boosting sales.The booth 0ffers information introducing the company's new products and services.To achieve the desired result, Vitacorp's marketing department will attempt to attract more people to the booth.The marketing director's first measure was to instruct each salesperson to call his or her five best customers and personally invite them to visit the booth.

Which of the following, if true, most strongly supports the prediction that the marketing director's first measure will contribute to meeting the goal of boosting sales?

【选项】Most of Vitacorp's best customers also have business dealings with Vitacorp's competitors.