In which situations does the Database Writer process (DBWn) write to data files? (choose two). 

Answer options:

A. when the RMAN recovery process starts
B. when a user process commits a transaction
C. when a tablespace is made read-only or taken offline
D. when PMON cleans up dirty buffers in the database buffer cache
E. when clean buffers for reading new blocks into the database buffer cache are not found easily

BD

References - https://docs.oracle.com/cd/B19306_01/server.102/b14220/process.htm