Which two statements regarding the Flashback Table feature are correct?

Which two statements regarding the Flashback Table feature are correct? (Choose two.)

A.
Flashback Table can be performed on system tables.

B.
Flashback Table operation does not shrink the segments.

C.
Flashback Table uses log mining to extract SQL_REDO and SQL_UNDO statements.

D.
Flashback Table operation acquires exclusive data manipulation language (DML) locks.