已知float x=2.23,y=4.35;，根据下面的输出结果，正确的程序段是（ ）。x=2.230000,y=4.350000 y+x=6.58,y-x=2.12
选项：

A:printf("x=%8.2f,y=%8.2f",x,y); printf("y+x=%4.2f,y-x=%4.2f",y+x,y-x);;
B:printf("x=%8.6f,y=%8.6f",x,y); printf("y+x=%4.2f,y-x=%4.2f",y+x,y-x);;
C:printf("x=%7.2f,y=%7.2f",x,y); printf("y+x=%3.2f,y=%3.2f",y+x,y-x);;
D:printf("x=%f,y=%f",&x,&y); printf("y+x=%f,y=%f",y+x,y-x);