Which option would explain why servers become unavailable during a vRealize Automation installation when the install wizard is fixing the prerequisites on the Windows IaaS servers?

Which option would explain why servers become unavailable during a vRealize Automation installation when the install wizard is fixing the prerequisites on the Windows IaaS servers?
A . One or more of the fixes for the prerequisites requires a reboot.
B . IPSec must be disabled on all Windows systems to prevent connection issues.
C . The vRA appliance disconnects the servers as part of the registration.
D . The IaaS integration service must be restarted due to instability.

Answer: A