[单选题]8、 Which of the following HA solutions in a VPN deployment will provide remote client users with continuous connectivity following a failover?在VPN的部署中，在故障切换发生之后，哪些HA的解决方案将为远程用户提供不中断的连接?
A. VPN load balancing VPN负载平衡
B. Stateful 状态化
C. Redundant VPN peering 冗余VPN对等体
D. Stateless 无状态