Resilience against a single ESXi host failure requires high availability (HA) for management

components in VCF. VMware Aria Suite, including Aria Automation, supports HA via clustering.

Option B, deploying "three Aria Automation appliances in a clustered topology," ensures that if one

host fails, the remaining two can maintain service, meeting the requirement directly. A cluster of

three nodes is the minimum for HA in Aria Automation, providing fault tolerance within a VCF

management domain. Option A (stretched workload domain) is unrelated to management tooling

HA, C (Aria Suite Lifecycle clustering) isn’t a standard HA feature for that component, and D (load

balancer for Operations proxies) addresses a different component and purpose.

Reference: VMware Aria Automation 8.10 Installation Guide, Section on High Availability

Configuration; VMware Cloud Foundation 5.2 Architecture and Deployment Guide, Management

Domain HA.