Final answer:
Option A, a decrease in airfares to Hawaii, would lead to an increase in demand for hotel rooms in Hawaii, as it lowers the overall cost of visiting the state.
Step-by-step explanation:
When considering the options given, A) A decrease in airfares to Hawaii would result in an increase in demand for hotel rooms. This is because lower travel costs make Hawaii more accessible to a larger group of potential visitors, who are then more likely to book hotel rooms. The correct answer is not B) A downward movement along the demand curve for stays in Hawaiian hotel rooms, as this represents a decrease in price leading to a higher quantity demanded, not an increase in demand itself. C) An upward movement along the demand curve for stays in Hawaiian hotel rooms indicates a higher price leading to a lower quantity demanded, which does not signify an increase in actual demand. Lastly, D) An increase in airfares to Hawaii would typically lead to a decrease in demand for hotel rooms, as the higher cost of travel would deter some people from visiting.