An administrator is responsible for managing a VMware Cloud Foundation (VCF) fleet.

VCF Automation event subscriptions support Boolean conditions that determine whether the associated workflow runs. VCF 9.0 states that filters can be applied to subscriptions so that “the event and workflow only triggers if the Boolean expression is ‘true’.” Conditions can access event payload values through event.data, and the != operator is explicitly supported.

Because the stated requirement is specifically to create DNS records only when domainName has been provided, the subscription must test the corresponding custom property:

event.data.customProperties[ ' domainName ' ] != null

Option C checks hostname, which does not satisfy the stated condition. Option B addresses execution ordering: blocking subscriptions prevent another matching subscription from receiving the event until the current runnable item finishes. Option A is relevant to cleanup if the primary workflow fails because VCF supports recovery runnable items for blocking subscriptions, but it does not determine whether the DNS workflow should run based on the presence of the domain name.