Which three statements regarding the server parameter file （SPFILE） are true（）
- AAn SPFILE is a binary file.
- BAn SPFILE cannot reside on a client.
- CAn SPFILE cannot contain static parameters.
- DAn SPFILE can store changes persistently across instance restarts.
- EAn SPFILE can be read by the database server， but it is not written to by the server.
- FAn SPFILE must be created manually， before creating a database， even if you use the DatabaseConfiguration Assistant （DBCA） to create the database.