Which statement about application-period temporal tables is true?

A.
Is based on explicitly-supplied timestamps that define the time periods during which data
is valid.

B.
Is useful when one wants to keep both user-based period information and system-based
historical information.

C.
Consists of explicitly-supplied timestamps and a separate associated history table.

D.
Consists of a pair of columns with database-manager maintained values that indicate the
period when a row is current.