A．Just let you go.
B．Offer a lower price.
C．Apologize to you.
D．Try to retain you.

A．Costly.
B．Time-consuming.
C．Genuine.
D．Safe.

A．Leaving our personal information on the sites.
B．Sending out our information to a group.
C．Giving out the contact page to our target.
D．Copying the same words and sending them to all.