What are the changes in the equilibrium price and equilibrium quantity? During Valentine's week, the equilibrium price of a box of chocolates ______ and the equilibrium quantity ______. A. might rise or fall depending on whether demand increases by more or less than the supply decreases; increases B. rises because the cost of a red box increases the price; increases because more people buy boxes of chocolates regardless of the rise in the price C. does not change because the cost of the red box balances the increase in the demand; increases because demand increases but the price doesn't rise D. rises; increases because demand increases by more than supply decreases