单选题

下列sql语句中哪条语句可为用户zhangsan分配数据库userdb表userinfo的查询和插入数据权限（）。

Question

A. grant select,insert on userdb.userinfo to'zhangsan'@'localhost'

B. grant'zhangsan'@'localhost'to select,insert for userdb.userinfo

C. grant select,insert on userdb.userinfo for'zhangsan'@'localhost'

D. grant'zhangsan'@'localhost'to userdb.userinfo on select,insert