Which fact about handcuffing is true?

The statement that security personnel must physically secure handcuffs is true because it emphasizes the importance of proper handling and application of restraints for safety and control. When individuals are detained, particularly in law enforcement or security contexts, ensuring that handcuffs are applied correctly is crucial to prevent escape and to maintain the safety of both the officer and the subject. Physically securing the handcuffs ensures they are tight enough to restrict movement, yet not so tight that they cause injury, which is essential for ethical and effective restraint techniques.

In contrast, other options present misleading or overly broad statements. The notion that handcuffs should be applied loosely for comfort disregards the need for effectiveness and control in restraints. Suggesting that handcuffs are only used for violent subjects limits the understanding of their application, as they can also be employed in situations where a subject may pose a risk to themselves or others, even if they are not exhibiting violent behavior. Lastly, asserting that all subjects must be handcuffed regardless of circumstances is incorrect; the use of handcuffs should always be based on situational assessment, warranting discretion by officials who must consider the behavior and risk level of the subject involved.