How is the unified command system accurately described?

The unified command system is accurately described by the idea that overall management of an incident is a shared responsibility among all parties involved. This approach is essential for effectively managing emergency situations, as it allows multiple agencies and organizations to work collaboratively rather than independently. By sharing responsibility, each agency can leverage its unique expertise and resources, leading to a more coordinated and efficient response to incidents, particularly those involving hazardous materials or complex scenarios.

In a unified command, representatives from various agencies come together to establish a common set of objectives and strategies, ensuring that all perspectives are considered and that responses are harmonized. This collaboration is crucial for effective communication, aiding in the minimization of conflicts and redundancies in incident management.

The other aspects, such as operating independently or transferring authority between agencies, undermine the collaborative nature that the unified command system is designed to promote. Additionally, limiting the system to only local agencies would restrict the breadth of resources and perspectives necessary for comprehensive incident management. Thus, the emphasis on shared responsibility makes option C the accurate portrayal of the unified command system.