Which of the following guidelines should you follow when staying in a hotel?

A) Do not allow strangers in your hotel room.
B) Leave valuables in a desk drawer in the hotel room rather than carrying them with you when outside the room.
C) When there is an emergency, such as a fire, you should call the front desk to ask about a proper escape route.
D) If you lose your room key, tell hotel personnel when you check out the following day.