Which modifier is used to change listener parameters in the Listener Control utility environment？（）

A.Stripes a single backup set across multiple channels.
B.Identical copies of backup pieces within a backup set.
C.Multiple backup sets with multiple channels configured.
D.Simultaneous reads from multiple files and writes into the same backup piece.

A.Data encryption.
B.User authentication.
C.Transparent data conversion
D.Configuration and administration mechanisms.
E.Support for multiple network transport protocols.

A.Until SCN
B.Until time
C.Until cancel
D.Recover using backup control file.