What can you do to keep old log files, when free space falls below 45 MB?

In SmartDashboard, you configure 45 MB as the required free hard-disk space to accommodate logs. What can you do to keep old log files, when free space falls below 45 MB?

A.
Define a secondary SmartCenter Server as a log server, to transfer the old logs.

B.
Configure a script to archive old logs to another directory, before old log files are deleted.

C.
Do nothing. Old logs are deleted, until free space is restored.

D.
Use the fwm logexport command to export the old log files to other location.

E.
Do nothing. The SmartCenter Server archives old logs to another directory.