You have a production implementation of Management High Availability, at version VPN-1 NG with Application Intelligence

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You have a production implementation of Management High Availability, at version VPN-1 NG with Application Intelligence R55. You must upgrade your two Smart
Center Servers to VPN-1 NGX. What is the correct procedure?

A. 1. Synchronize the two Smart Center Servers. 2. Upgrade the secondary Smart Center Server. 3. Upgrade the primary Smart Center Server. 4. Configure both Smart Center Server host objects version to VPN-1 NGX. 5. Synchronize the Servers again.
B. 1. Synchronize the two Smart Center Servers. 2. Perform an advanced upgrade on the primary Smart Center Server. 3. Upgrade the secondary Smart Center Server. 4. Configure both Smart Center Server host objects to version VPN-1 NGX. 5. Synchronize the Servers again.
C. 1. Perform an advanced upgrade on the primary Smart Center Server. 2. Configure the primary Smart Center Server host object to version VPN-1 NGX. 3. Synchronize the primary with the secondary Smart Center Server. 4. Upgrade the secondary Smart Center Server. 5. Configure the secondary Smart Center Server host object to version VPN-1 NGX. 6. Synchronize the Servers again.
D. 1. Synchronize the two Smart Center Servers. 2. Perform an advanced upgrade on the primary Smart Center Server. 3. Configure the primary Smart Center Server host object to version VPN-1 NGX. 4. Synchronize the two Servers again. 5. Upgrade the secondary Smart Center Server. 6. Configure the secondary Smart Center Server host object to version VPN-1 NGX. 7. Synchronize the Servers again.