Which of the following best explains why companies are adopting the team selling approach to service large, complex accounts?

A、 Products have become too complicated for one salesperson to handle a large company's needs.
B、 Customers prefer dealing with many salespeople rather than one sales representative.
C、 Job rotation, an integral part of team selling, keeps workers motivated and boosts their morale.
D、 Team selling facilitates the evaluation of individual contributions.
E、 With team selling, companies are not required to train the outside sales force any longer.