单选题You have issued a SHUTDOWN ABORT command to bring down your database instance. Considerthe steps that will be performed later when you open the database： 1：SGA is allocated. 2：Control file is read. 3：Redo log files are read. 4：Instance recovery is
题目
单选题
You have issued a SHUTDOWN ABORT command to bring down your database instance. Considerthe steps that will be performed later when you open the database： 1：SGA is allocated. 2：Control file is read. 3：Redo log files are read. 4：Instance recovery is started. 5：Background processes are started. 6：Data files are checked for consistency. 7：Server parameter file or the initialization parameter file is read. Which option has the correct order in which these steps occur（）
A
7，1，5，2，3，6，4
B
1，2，3，7，5，6，4
C
7，1，4，5，2，3，6
D
1，7，5，4，2，3，6