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Part $1$

Small increases in customer retention can result in large increases in profit because$\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

existing customers can be serviced with less expensive staff members

B$.$

it costs four to five times more to get a new customer than it does to retain one

C$.$

new customers are fickle and frequently switch vendors

D$.$

returning customers always buy more units relative to new customers

E$.$

retention is very easy given most customers are reluctant to change suppliers