You executed the following commands to find the location of the alert log file： Where is the alert log file stored（）

• A、in the BACKGROUND_DUMP_DEST location； in text format
• B、in the BACKGROUND_DUMP_DEST location； in XML format
• C、in the BACKGROUND_DUMP_DEST location； in both text and XML format
• D、in the DIAGNOSTIC_DEST/diag/rdbms/orcl/orcl/alert directory； in text format
• E、in the DIAGNOSTIC_DEST/diag/rdbms/orcl/orcl/alert directory； in XML format
• F、in the DIAGNOSTIC_DEST/diag/rdbms/orcl/orcl/alert directory； in both text and XML format