An Administrator Is Attempting an OS Upgrade on a VM

An administrator is attempting an OS upgrade on a VM disk that is stored on a SAN. In the event of a failure, the administrator wants to ensure the system can return to a working state in the shortest amount of time possible. Which of the following backup methods would BEST accomplish this?

A) A storage-level snapshot made on the SAN
B) A full file-system backup stored on the SAN
C) A full file-system backup stored on an LTO tape
D) A system recovery point made with the OS
E) A bit-level image stored on an SSD in the VM host

Correct Answer:

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