Node.js event-based modules use the EventEmitter pattern.
The correct syntax for listening to events is:
emitter.on( ' eventName ' , callback)
The server library emits an ' error ' event, which must be listened to using .on.
Option analysis:
* A: .catch is for Promises, not EventEmitters.
* B: .error is not an EventEmitter method.
* C: Correct. Listens to the ' error ' event.
* D: try...catch only captures synchronous errors, not event-based asynchronous errors.
Therefore, the correct answer is option C .
JavaScript Knowledge References (text-only)
* The EventEmitter API uses on(event, handler) to listen for events.
* Errors emitted asynchronously cannot be caught with try...catch.
* The ' error ' event is standard for Node.js modules to signal operational errors.