In the Aura Component Framework, application events are handled using a publish-subscribe model. To broadcast an event to all components that have registered a handler for it, the fire() method is used on the event instance. A component first gets a reference to the event using $A.get("e.namespace:eventName"), optionally sets parameters on it, and then calls fire() to dispatch it. This method is fundamental to the event-driven architecture of Aura components.

B. SegdetesEvent(): This is not a valid method in the Aura framework. The name appears to be a typo or a fabricated function name.

C. FireEvent(): This is not a standard method in the Aura framework. Method names in JavaScript are case-sensitive, and the correct method is fire().

D. emit(): This method is used for dispatching events in Lightning Web Components (LWC), not in the Aura Component Framework.

- Salesforce Lightning Aura Components Developer Guide, "Firing Component Events", Section: Firing an Event. The guide explicitly shows the syntax: var appEvent = $A.get("e.c:appEvent"); ... appEvent.fire();.

- Salesforce Lightning Aura Components Developer Guide, "Application Event Example", This section provides a complete example demonstrating the use of event.fire() to publish an application event.