The correct answer is C because the exit relay is the final Tor relay that sends traffic out to the destination service. Tor's own documentation states that the website, chat service, email provider, or other destination will see the IP address of the exit relay instead of the actual Tor user. That is exactly why abuse complaints and takedown pressure usually focus on exit relays. Entry guards see the user first, middle relays pass traffic inside the circuit, and bridge nodes help users connect to Tor when normal entry points are blocked, but those components are not normally the publicly visible source IP presented to outside services. CHFI v11 includes dark web concepts, TOR relays, TOR bridge nodes, and the forensic risks of investigating anonymized environments, so understanding relay roles is directly relevant to the exam. In attribution or infrastructure investigations, analysts must know which relay type will appear in third-party logs or external complaints.
Since destination systems see the exit node as the apparent source of outbound traffic, the best answer is exit relay.