Both gasoline price and cost of vacation in Hawaii go up by 40%. Let us consider gasoline as a necessity good and vacation in Hawaii as a luxury good. Which of the following is true? Select one:
a) Demand for gasoline will decrease while demand for vacation in Hawaii will increase.
b) Demand for gasoline will remain relatively unchanged while demand for vacation in Hawaii will decrease.
c) Demand for gasoline will increase while demand for vacation in Hawaii will decrease.
d) Demand for gasoline will remain relatively unchanged while demand for vacation in Hawaii will increase.