When handling packages of explosives, you must:

In the context of handling packages of explosives, it is crucial to follow safety protocols to prevent accidents and ensure the safety of all personnel involved. The correct approach emphasizes the idea that using hooks or other metal tools can create sparks or friction, which poses a significant risk when dealing with explosives. Metal tools can potentially ignite the explosive materials or accidentally cause damage to the packages, thereby leading to hazardous situations.

While other options may touch on important aspects of safety and handling, the focus on avoiding metal tools specifically addresses a direct risk associated with explosives. Keeping bystanders at a safe distance and the appropriate wrapping of packages are also important safety practices, but they do not provide the same level of immediate risk mitigation as avoiding metal tools. Thus, the focus on the dangers posed by metal tools is why that particular option stands out as a critical guideline when handling explosives.