Room Availability Forecasts Often Allow for Adjustments Based Upon Historical

Room availability forecasts often allow for adjustments based upon historical data. In regard to these adjustments, which of the following is true?

A) No-shows are guests with reservations (either guaranteed or non-guaranteed) who never arrive
B) Understays are guests who stay at least one night beyond their scheduled departure date
C) Cancellations are treated in much the same way as stayovers
D) Early arrivals are guests who check out at least one day prior to their scheduled departure
E) Answers A, C, and D are true. But B is false because that is the definition for overstays