After its customers complained about being pressured to buy unneeded insurance, an insurance agency stopped rewarding its agents for high sales volume and instead gave them bonuses for high levels of customer satisfaction. Under this new plan, both customer satisfaction and the insurance agency's sales increased.
Each of the following, if true, helps to explain how the change in incentives for agents could have resulted in increased sales EXCEPT:
问的是: explain the sales increase A. they recommended the agency to their friends----------increase the sales; B. sell them additional insurance policies -------- increase the sales; D. became customers of the agency ------------ increase the sales; E. customers approached the agency --------- increase the sales;