[单选题]The configuration of the online redo log files is 

A  The LGWR process concurrently writes the redo log entries to both the members of a group.

B  When a member of a group becomes corrupt， the database crashes.

C  The sizes of the redo01a.log and redo01b.log online redo log members of group Group1 can be different.

D  When redo02a.log and redo02b.log files become corrupt， then the database operations will proceed as normal.