Exhibit， error You work as a database administrator for Supportcenter.cn. When you try to connect to the database， you get an error （See exhibit）. What could be the possible reason for getting such an error？（）

• A、Database is not open
• B、Listener is not running
• C、Service name is not correct
• D、Wrong port number used in URL
• E、Usersysdoes have themediaprivilege