以下程序的输出结果是( )main(){int a[] = {1, 2, 3, 4}, i, x = 0;for(i = 0; i < 4; i++){sub(a, &x); printf( “ %d ” , x);}pritnf(“\n” );}sub(int *s, int *y){static int t =3;*y = s[t];t--;}

A. 4444
B. 0000
C. 1234
D. 4321