What are the recommendations for Oracle Database 11g installation to make it Optimal Flexible Architecture (OFA)-compliant? （）

• A、ORACLE_BASE should be set explicitly.
• B、An Oracle base should have only one Oracle home created in it.
• C、Flash recovery area and data file location should be on separate disks.
• D、Flash recovery area and data file location should be created under Oracle base in a non-Automatic Storage Management (ASM) setup.