In the diagram below, the market demand for a good increases, causing the demand curve to shift from D1 D_1\,D1 to D2D_2D2.

Which area represents the change in producer surplus resulting from this demand shift, where O O\,O is the origin?
P1UVP2P_1 U V P_2P1UVP2
Q1UVQ2Q_1 U V Q_2Q1UVQ2
P2VQ2OP_2 V Q_2 OP2VQ2O
P2VUP_2 V UP2VU