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

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.