Cold weather in the Midwestern and eastern United States increases the popularity of vacations in sunny California. At the same time, the hotel employees' union in California negotiates a significant pay increase for its members. The likely impact on the hotel market in California is:
a. an increase in the price of hotel rooms and an increase in hotel room rentals

b. an increase in the price of hotel rooms and a decrease in hotel room rentals.
c. an uncertain effect on the price of hotel rooms, but an increase in the quantity of hotel rooms rented.
d. an increase in the price of hotel rooms, but an uncertain effect on the quantity of hotel rooms rented.

d