Which one of the following belongs to the tips of hotel check-out?( )

A.Take your time packing before you check out.

B.Do a complete sweep of the room.

C.Don’t leave a tip.

D.When checking out, be sure to review your entire bill.

正确答案：Take your time packing before you check out.

Do a complete sweep of the room.

When checking out, be sure to review your entire bill.