British Columbia Security Guard License Practice Exam - Prep, Practice Test & Study Guide

When faced with multiple aggressive individuals, the most prudent course of action is to call for backup immediately. This is because confronting several aggressive subjects at once can escalate the situation and significantly increase the risk of harm to oneself.

The presence of additional personnel not only helps in managing the aggressive subjects more effectively but also provides a safer environment for both the security personnel and bystanders. Backup can consist of other guards, law enforcement, or emergency responders, all of whom can be vital in de-escalating the situation or safely managing the individuals involved.

The other options, while they may seem practical in certain contexts, can overly expose a single security personnel to danger. Engaging one subject at a time or attempting to negotiate could be ineffective and perilous without support, and retreating might not resolve the situation but rather allow the aggression to continue, potentially putting others at risk. Calling for backup is a proactive measure that enhances safety and ensures a more controlled response to the incident.