What is one of the anti-terrorism measures referred to in the playbook?

The correct answer emphasizes the implementation of random screenings of baggage and passengers as an anti-terrorism measure. This approach aims to enhance security by creating uncertainty for potential threats, making it more challenging for individuals who intend to carry out malicious acts to plan effectively. Random screenings serve as a deterrent, ensuring that anyone attempting to bypass security must be prepared for the possibility of being checked at any given time, thus increasing the overall safety of travel environments, such as airports.

In contrast, the other options do not primarily focus on addressing anti-terrorism measures in the same direct manner. Increased ticket prices might impact airline revenue or passenger behavior, but it does not fundamentally enhance security protocols. Mandatory security training for staff is certainly beneficial for improving overall safety, but it is more about staff preparedness rather than direct anti-terrorism actions. Frequent flyer mile restrictions might affect loyalty programs but do not contribute to the physical or procedural security necessary to thwart terrorist threats.