How does Cluster XL Unicast mode handle new traffic?

How does Cluster XL Unicast mode handle new traffic?
A . All members receive all packets. The Security Management Server decides which member will process the packets. Other members delete the packets from memory.
B . The pivot machine receives and inspects all new packets then synchronizes the connections with other members
C . The pivot machine receives all the packets and runs an algorithm to determine which member should process the packets
D . All cluster members’ process all packets and members synchronize with each other. The pivot is responsible for the master sync catalog

Answer: C