Which two statements are true in any RAC environment? (Choose two.)
A.
After your redo threads are defined, you cannot add new ones.
B.
A RAC database must contain at least two threads of redo log files per instance.
C.
A RAC database must contain at most one redo thread for each instance.
D.
A publicly enabled thread can be used by any instance of your RAC database.
E.
A redo thread must contain at least two groups of redo log files before it can be enabled.