The price of paper fiber, the key ingredient to producing cardboard boxes, increases significantly. How will an increase in the price of paper fiber affect the market for cardboard boxes?

P DT: PT, QT DI D1 D2 DI Q Q 0 0 (a) (b ) Increase in demand Decrease in demand P $2 SI ST: PL, QT st: PT, Q+ D D Q Q 0 0 ( c) (P)