有以下程序段：
char ch; int k;
ch='a'; k=12;
printf("%c, %d, ", ch, ch); printf("k=%d\n", k);
已知字符a的ASCII码值为97，则执行上述程序段后输出结果是( )。

A) #include ＜stdio.h＞
main();
/*programming*/
printf("programming!\n");
B) #include ＜stdio.h＞

main()
/*/programming/*/
printf("programming!\n");
C) #include ＜stdio.h＞
main()
/*/*programming*/*/
printf("programming!\n");
D) include ＜stdio.h＞
main()
/*programming*/
printf("programming!\n");

A) 11 12↙
B) 11, 12↙
C) 11, 12,↙ D) 11,↙12↙