When I was twenty, I had to ___ before graduation and work in a clothes shop to help support my family.

A．drop out

B．come out

C．leave out

D．stay out

在客户生命周期管理中离网期对预离网客户应在注意保护客户信息隐私的同时结合客户离网原因，通过哪些方式有效维系挽留和维系挽留客户？（）

A.特殊资费策略

B.积分促销

C.捆绑策略

D.赠送策略

E.投诉客户关怀