Which statement about application-period temporal tables is true?

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

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

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

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

Explanation: