In the diagram, a successful advertising campaign shifts the demand for a good from D1 D_1\,D1 to D2D_2D2.

Which area represents the resulting change in producer surplus?
P2YXP1P_2 Y X P_1P2YXP1
P1XRP_1 X RP1XR
P2YRP_2 Y RP2YR
Q1XYQ2Q_1 X Y Q_2Q1XYQ2