include("conn.php");mysql_query("set names gb2312");mysql_select_db

include（"conn.php");mysql_query（"set names gb2312");mysql_select_db

include("conn.php");

mysql_query("set names gb2312");

mysql_select_db("test");

$sqlstr="delete from sanguo";

$result=mysql_query($sqlstr,$conn);

阅读以上代码,请问该代码的功能是（）。

A.向sanguo中修改记录

B.向sanguo中查看记录

C.向sanguo中删除记录

D.向sanguo中添加记录