The Price of a New Textbook Increases from $120 to $160

Multiple Choice

The price of a new textbook increases from $120 to $160, while the price of used copies of the textbook increased from $80 to $100. Other things being equal, we would expect

A) the quantity demanded of the used textbook to increase and the quantity demanded of the new textbook to decrease.
B) the quantity demanded of both to fall.
C) the demand for the new textbook to increase and the demand for the used textbook to decrease.
D) the quantity demanded of the used textbook to decrease and the quantity demanded of the new textbook to increase.