字符'0'的ASCII码的十进制数为48,且数组的第0个元素在低位,则以下程序的输出结果是_____________。#includemain( ){ union { int i[2];long k;char c[4];}r,*s=&r;s->i[0]=0x39;s->i[1]=0x38;printf("%c\n",s->c[0]) ;}

A. 39
B. 9
C. 38
D. 8