【文件】在C中,以下打开C程序源文件的程序段中正确的是__________。A)#includeB)#includeFILE*fp;FILEfp;fp=fopen("file1.c","wb");fp=fopen("file1.c","w");C)#includeD)#includeFILE*fp;FILE*fp;fp=fopen("file1.c","w");fp=fopen("file1.c","w"); A: B: C: D: D