A user issues a SELECT command against the Oracle database. Which of the following choices describes a step that Oracle will execute in support of this statement?（）

A.ALTER DATABASE 
B.SET TRANSACTION 
C.ALTER ROLLBACK SEGMENT 
D.ALTER TABLE

A.One runs faster than the other
B.A conventional path data load bypasses most of the Oracle RDBMS, whereas a direct path load is a high-speed version of the SQL INSERT
C.A direct path data load bypasses most of the Oracle RDBMS, whereas a conventional path load is a high-speed version of the SQL INSERT
D.The conventional path runs when the CONVENTIONAL command-line parameter is set to TRUE

A.Library cache 
B.Row cache 
C.Session UGA 
D.Buffer cache