Which of the following restraints can Fire Marshals use?

Fire Marshals are authorized to use handcuffs that have been approved by the Bureau of Fire Investigation as they are specifically designed for law enforcement and provide a secure, controlled way to restrain an individual when necessary, especially in the context of maintaining scene safety and preventing harm during investigations.

This choice emphasizes the importance of adherence to standards and regulations that govern law enforcement practices. The approved handcuffs are intended for use within a professional context, ensuring that Fire Marshals can manage situations involving potentially dangerous or uncooperative individuals effectively while maintaining safety and legal compliance.

The other options, while they may involve methods of restraint, do not meet the established criteria or standards for use by Fire Marshals. For example, basic zip ties and rope ties may not be durable or secure enough and do not have an official endorsement or guidelines that apply to Fire Marshals in their line of work. Furthermore, the limitation of physical restraints to three minutes does not align with established practices regarding restraining individuals, as it may not provide adequate time for managing a situation effectively and safely.