单项选择题

以下程序的输出是
struet st
int x;int *y; *p;
int dt[4]=10,20,30,40;
struct st aa[4]=50,&dt[0],60,&dt[0],60,&dt[0],60,&dt[0];
main( )
p=aa;
printf("%d\n",++(p->x));

A.10
B.11
C.51
D.60