The use of the `event notification destination create -name syslog` and `event notification create -filter-name important-events -destinations syslog` commands indicate that specific event notifications, which are typically EMS (Event Management System) messages in this context, are being forwarded. Additionally, the `cluster log-forwarding create -destination` command specifies a destination IP and port for log forwarding, which usually includes command history. Therefore, the correct answers are command history and EMS messages.