To determine the space allocated for temporary segments, the DBA can access which of the following views? （）

A.Redo log switches. 
B.UPDATE statements are issued against the database. 
C.The SYSTEM tablespace is accessed. 
D.SMON coalesces free space in a tablespase.

A.V$CONTROLFILE 
B.V$DATABASE 
C.init.ora 
D.DBA FILES

A.ARCH 
B.SMON 
C.LGWR
D.SERVER