The following are the details of your database：  
Instance name：test  
Host name：tech1.us.oracle.com  
IP address：145.33.230.186 
Enterprise Manager Console HTTP Port number：5500  
You started the database instance and you want to manage your database remotely with Enterprise Manager through a Web browser. Which two URLs would you use to access the Database Control？（）

A.create baseline metrics for today’s performance
B.write the current database metrics to a database table and create a trigger to compare with future database statistics
C.write the current database metrics to a flat file and create an operating script to compare with future database statistics
D.write the current database metrics to a database table and create a procedure to compare with future database statistics
E.write the current database metrics to a database table and submit a job using DBMS_JOB to compare with future database statistics

A.guarantee undo retention
B.add one more redo log group
C.size the redo log files appropriately
D.size the UNDO tablespace appropriately
E.size the SYSTEM tablespace appropriately
F.configure an appropriate undo retention interval
G.change automatic undo management to manual

A.audit trail
B.alert log file
C.user trace file
D.online trace file
E.background trace file
F.operating system event viewer