In what way is Secure Network Distributor (SND) a relevant feature of the Security Gateway?

In what way is Secure Network Distributor (SND) a relevant feature of the Security Gateway?
A . SND is a feature to accelerate multiple SSL VPN connections
B . SND is an alternative to IPSec Main Mode, using only 3 packets
C . SND is used to distribute packets among Firewall instances
D . SND is a feature of fw monitor to capture accelerated packets

Answer: C