Which element is crucial for planning an event that requires adherence to strict privacy guidelines?

The selection of event visibility settings is essential when planning an event with strict privacy guidelines because these settings determine who can view the event details and attendee information. Proper management of these settings ensures that sensitive data is protected and only accessible to authorized individuals. This helps maintain confidentiality, comply with privacy regulations, and protect attendees' personal information from being improperly shared or viewed by unauthorized parties.

While attendee registration is important in gathering participant information, without the right visibility settings in place, this data can potentially be exposed to unwanted audiences. Effective security measures and adjustments in visibility can help foster a safe environment where attendees feel secure knowing their information is being handled properly. Similarly, interactive features and banner promotions are more about enhancing engagement and visibility rather than safeguarding data privacy, making them less critical in a privacy-sensitive context.