单项选择题

有以下程序: #include<stdio.h> main() {FILE*fp;int i,k,n; fp=fopen("data.dat","w+"); for(i=1;i<6;i++) {fprimtf(fp,"%d",i); if(i%3==0)fprintf(fp,"\n"); } rewind(fp); fscanf(fp,"%d%d",&k,&n);printf("%d%d\n",k,n); fclose(fp); } 程序运行后的输出结果是______。

A.0 0
B.123 45
C.1 4
D.1 2