Which of the following can trigger a workflow rule?

Correct answer: Record creation and updates

Option B is correct because Salesforce workflow rules can be triggered on record creation and on record updates, including the option to trigger on every save or only when criteria are met for the first time, but they do not support deletion as a trigger event. Option A is incorrect because workflow rules cannot be triggered by record deletion; that use case requires Apex triggers or Flow. Option C is wrong because workflow rules are not limited to manual actions; they fire automatically based on the configured trigger criteria and record events. Option D is too narrow; while record creation is a valid trigger, workflow rules also support update-based triggers, making this answer incomplete.