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

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.