What is the use of an "all configuration" backup in Cisco UCS？（）

• A、 Can be used to migrate from a 6120 to a 6140 and retain the same service profiles
• B、 Can only be used on the fabric interconnect on which it was created
• C、 Can be used to migrate from a 6120 to 6140 and retain system IP addresses and cluster information
• D、 Can be used to match firmware versions between 6120 and 6140 during a migration