[单选题]31、 When deploying an active/standby failover solution for HA requirements, which should you configure to prevent the use of an ASA answering an ARP request with the BIA for its physical interface?当为HA需求配置active/standby故障切换的解决方案时，你应当配置下面的哪一个来防止ASA使用它的物理接口的BIA来回应ARP的请求?
A. DPD
B. VMAC
C. ARP
D. Interface Monitoring 接口监控