在Oracle中，用ALTER将scott的口令改为hello，下列哪个是正确的？（）A.ALTER USER scott IDENTI

在Oracle中，用ALTER将scott的口令改为hello，下列哪个是正确的？（）

A.ALTER USER scott IDENTIFIED BY hello

B.ALTER scott USER IDENTIFIED BY hello

C.ALTER USER scott IDENTIFIED AS hello

D.ALTER USER hello IDENTIFIED BY scott

请帮忙给出正确答案和分析，谢谢！