第4题博弈树对应的策略式表述，如下表所示 参与人2 (a，c)(a，d)(b，c)(b，d)参与人1M-1，-2-1，-2x1， y1x2， y2Nx3，y3x4，y40， 21，1 该博弈双矩阵表述的支付值，正确的是（ ）
选项：

A:(x1,y1) = (2, 0), (x2,y2) = (2,0), (x3,y3)= (0,2), (x4,y4) = (1,1);
B:(x1,y1) = (-1, -2), (x2,y2) = (-1,-2), (x3,y3)= (0,2), (x4,y4) = (1,1);
C: (x1,y1) = (0, 2), (x2,y2) = (0,2), (x3,y3)= (2,0), (x4,y4) = (2,0);
D:(x1,y1) = (0, 2), (x2,y2) = (0,2), (x3,y3)= (2,0), (x4,y4) = (2,0)