An administrator must ensure DNS records are created only when the domain name is provided.

The requirement is to ensure DNS records are created only when a domain name is provided.

Since the blueprint includes a custom property for domainName, the correct conditional logic in the event subscription must validate that this property is not null.

Adding the condition:

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

ensures the workflow executes only when the domain name is provided.

Option B validates hostname instead of domain name.

Option A controls workflow blocking, not conditional execution.

Option C relates to cleanup, not creation condition validation.