You used the IMMEDIATE option to shut down your database instance. Consider the steps that <br /> mayoccur when a database instance is started and database is opened: <br /> 1:SGA is allocated. <br /> 2:Control file is read. <br /> 3:Redo log files are opened. <br /> 4:Instance recovery is started. <br /> 5:Background processes are started. <br /> 6:Data file headers are checked for consistency. <br /> 7:Server parameter file or the initialization parameter file is read. <br /> Which option has the correct order in which these steps occur()
A、7,1,5,2,3,6,4
B、1,5,7,2,3,6;step 4 is not required
C、7,1,5,2,3,6;step 4 is not required
D、1,2,3,5,6,4;step 7 is not required