The database instance has the following parameter setting： OS_AUTHENT_PREFIX = OPS$ OS_ROLES = FALSE REMOTE_OS_AUTHENT = FALSE REMOTE_OS_ROLES = FALSE TIMED_OS_STATISTICS = 0 You have a local operating system user SKD.You create a database user OPS$SKD， and then assign external authentication. The user OPS$SKD has theCREATE SESSION privilege.  What would you achieve by the above process（）

• A、The database user OPS$SKD will be able to administer the database.
• B、The authentication detail for the database user OPS$SKD is recorded in the password file.
• C、The local operating system user SKD will be able to access the database instance without specifying theusername and password.
• D、The database user OPS$SKD has to login with the password of the local operating system user SKD toaccess the database instance.