What must be done to correct this issue?

A network administrator notices that SI events are not being updated. The Cisco FTD device is unable to load all of the SI event entries and traffic is not being blocked as expected. What must be done to correct this issue?
A. Restart the affected devices in order to reset the configurations.
B. Redeploy configurations to affected devices so that additional memory is allocated to the SI module.
C. Replace the affected devices with devices that provide more memory.
D. Manually update the SI event entries to that the appropriate traffic is blocked.