The 80-20 rule reflects the idea that ________.
A. 20 percent of the company's profits are generated by the top 80 percent of customers
B. the top 20 percent of customers are highly satisfied and 80 percent of customers will recommend the company to a friend
C. 20 percent of customers are unprofitable, and 80 percent make up a company's profits
D. the top 20 percent of customers often generate 80 percent of the company's profits
E. any new product will be accepted by 20 percent of the customers immediately, but 80 percent of the customers will be up for grabs throughout the product's life cycle
微信支付 
支付宝支付