Antonio’s makes the greatest pizza and delivers it hot to all the dorms around campus. Last week Antonio’s supplier of pepperoni informed him of a 25 percent increase in price. Which variable determining the position of the supply curve has changed, and what effect does it have on supply?

a. future expectations; supply decreases

b. future expectations; supply increases

c. input prices; supply decreases

d. input prices; supply increases

e. technology; supply increases