A Workflow rule can only be triggered when a record is created.
A Workflow rule can only be triggered when a record is created.
A Workflow rule in Salesforce can be triggered not only when a record is created but also when a record is updated. Therefore, the statement that a Workflow rule can only be triggered when a record is created is false.
I think the answer is A. https://help.salesforce.com/s/articleView?id=sf.workflow_rules_considerations.htm&type=5