Which three statements regarding the server parameter file （SPFILE） are true（）

• A、An SPFILE is a binary file.
• B、An SPFILE cannot reside on a client.
• C、An SPFILE cannot contain static parameters.
• D、An SPFILE can store changes persistently across instance restarts.
• E、An SPFILE can be read by the database server， but it is not written to by the server.
• F、An SPFILE must be created manually， before creating a database， even if you use the DatabaseConfiguration Assistant （DBCA） to create the database.