有以下程序：
#include ＜stdio.h＞
main()
FILE *fp; int k,n,a[6]=1,2,3,4,5,6;
fp=fopen("d2.dat","w");
fprintf(fp,"%d%d%d\n",a[0],a[1],a[2]);fprintf(fp，"%d%d%d\n",a[3],a[4],a[5]);
fclose(fp)；
fp=fopen("d2,dat","r");
fscanf(fp,"%d%d"，&k，&n);printf("%d%d\n"，k,n)；
close(f)；
程序运行后的输出结果是
A) 12
B) 14
C) 1234
D) 123456
