How does FortiGate handle configuration of flow tracking sampling if you export the settings to a managed FortiSwitch stack with sampling mode set to perimeter is true?

How does FortiGate handle configuration of flow tracking sampling if you export the settings to a managed FortiSwitch stack with sampling mode set to perimeter is true?
A . FortiGate configures FortiSwitch to perform ingress sampling on all switch interfaces.
B . FortiGate configures FortiSwitch to perform ingress sampling on all switch interfaces, except ICL and ISL interfaces.
C . FortiGate configures and enables flow sampling on FortiSwitch but does not change existing sampling settings of interfaces.
D . FortiGate configures and enables egress sampling on all management interfaces.

Answer: B