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.