Peanut butter, jelly sandwiches and tuna fish sandwiches are replacements. Assume an international agreement decreased the worldwide catch of tuna by half. The equilibrium price of grape jelly would be: (1) Increases while the equilibrium quantity is reduced. (2) Drop/fall while the equilibrium quantity rose. (3) Drop/fall and thus would the equilibrium quantity. (4) Increase, and thus would the equilibrium quantity.
Give the right answer of the above question.