Using the Ideal Room Rate Method, If Your Actual ADR

Using the ideal room rate method, if your actual ADR is lower than the ideal room rate, thisindicates:

A) Guests do not see your higher priced rooms as a good value. In other words, they don't believe your premium rooms are worth the incremental rate spread above your standard rooms
B) Your front desk is suffering from poor salesmanship
C) Your front desk is doing an excellent job upselling rooms to guests
D) Both A and B are true. C is false
E) Both A and C are true. B is false