What protocols should flight attendants follow during a security threat?

Remaining calm and following the captain's directions while maintaining passenger safety is crucial during a security threat. This approach ensures that the flight attendants can effectively manage the situation, as the captain is the ultimate authority on board and will have the most complete understanding of the threat and the best course of action to take. Flight attendants must focus on keeping passengers calm and composed to prevent panic, which could exacerbate any security issues. By prioritizing passenger safety and adhering to the captain's protocols, flight attendants can help secure the safety of everyone on board until the threat is resolved or further instructions are provided.

The other choices, while they may have some merit in specific contexts, do not encompass the comprehensive strategy required in such a critical situation. Contacting airport security is appropriate but may not be feasible in all circumstances; evacuating too soon could lead to chaos, and informing passengers they are safe might contradict the reality of an active security threat, potentially increasing anxiety or confusion among passengers. Hence, maintaining a calm demeanor and following established protocols is the best course of action.