You install a non-RAC Oracle Database. During Installation, the Oracle Universal Installer (OUI) prompts you to enter the path of the Inventory directory and also to specify an operating system group name. Which statement is true?（）

• A、The ORACLE_BASE base parameter is not set.
• B、The installation is being performed by the root user.
• C、The operating system group that is specified should have the root user as its member.
• D、The operating system group that is specified must have permission to write to the inventory directory