单项选择题

以下程序的输出结果是
#include<stdio.h>
struct st
i int x;int *y;*p;
int dt[4]=10,20,30,40;
struct st aa[4]=50,&dt[0],60,&dt[0],60,&it[0],60,&dt[0],;
main()
p=aa;
printf("%d\n",++(p->x));

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