Suppose there is a reduction in consumer income and an increase in the price of jet fuel, an important resource used in air travel. If air travel is a normal good, how will these changes influence the price and quantity of air travel? Select one: O a. The price will decrease and the quantity purchased will be indeterminate. O b. The price will increase and the quantity purchased will be indeterminate. O c. The price will be indeterminate and the quantity purchased will decrease. O d. The price will decrease and the quantity purchased will decrease