If you set the enable_ddl_logging parameter to true, which of the following is true in Oracle Database 12c? BC A DDL commands are logged in the $ADR_HOME/log/debug directory. B DDL commands aren’t logged in the alert log. C DDL commands are logged in the log/ddl directory under ADR, in the log.xml file. D DDL commands can be logged in the alert log and in the DDL log log.xml file.