Final answer:
If consumer incomes rise and books are a normal good, the market will experience an increase in both equilibrium price and equilibrium quantity of books, meaning answer choice A is correct.
Step-by-step explanation:
When consumer incomes rise and books are considered a normal good, the demand for books will increase because people now have more income to spend on goods they desire. According to the law of demand, when income rises, people buy more of a normal good.
An increase in demand, assuming supply remains constant, typically leads to a higher equilibrium price and a higher equilibrium quantity of the good sold. In this case, since demand has shifted to the right due to the increase in consumer incomes, the new equilibrium will be at a point where the equilibrium quantity of books has increased and the equilibrium price has also gone up, because people are willing to pay more for the books they want.
Thus, the correct answer to the market for books when consumer incomes rise, assuming that books are a normal good, is A. Price and quantity will increase.