Mark$$ Caffrey, vice president of sales at Samson$$ Pharmaceuticals, manages a sales team of ten employees. Members of$$ Mark's sales force vary in experience level. Four members of the sales team have worked at Samson for less than one year. The other six salespeople have been with Samson anywhere from three to seven years. Mark recently received the annual sales report and noticed that sales have been dropping steadily over the last year. Mark is considering the idea of providing training to his sales team as a way to boost sales.

Which one of the following most likely undermines the argument that the drop in$$ Samson's sales can be solved through$$ training