以下4个程序中，完全正确的是( )。

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");