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？（） 
（单选题）
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？（）
ADatabase is not open
BListener is not running
CService name is not correct
DWrong port number used in URL
EUsersysdoes have themediaprivilege
正确答案
答案解析
略
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