Which statements are true regarding SecureFile LOBs?()
A、The amount of undo retained is user controlled.
B、SecureFile LOBs can be used only for nonpartitioned tables.
C、Fragmentation is minimized by using variable-sized chunks dynamically.
D、SecureFile encryption allows for random reads and writes of the encrypted data.
E、It automatically detects duplicate LOB data and conserves space by storing only one copy.