Which setting controls how attendees can receive updates during the event?

The choice indicating "Notifications" is the correct answer as this setting directly manages how, when, and through what means attendees receive updates during an event. Notifications can include real-time alerts about schedule changes, important announcements, session reminders, or any other updates that the event organizers wish to communicate. By adjusting the notifications settings, attendees can personalize their experience, ensuring they stay informed based on their preferences, whether through push notifications, email alerts, or in-app messages.

The other options do not specifically focus on the delivery mechanism for updates. Privacy Settings relate to how personal data is handled and shared, which is crucial for user security but does not dictate communication methods. Communication Preferences may sound relevant, but it tends to encapsulate broader options regarding how attendees prefer to engage overall, not necessarily how they receive real-time updates. Event Guidelines typically provide the rules and procedures of the event rather than control the communication flow.