Final answer:
Bureaucracies with the clearest chains of command are those that have a hierarchical structure and a well-defined chain of command, allowing for efficient communication and decision-making.
Step-by-step explanation:
Bureaucracies with the clearest chains of command are most often those that have a hierarchical structure, where authority and decision-making flows from the top down. In this type of organization, there is a well-defined chain of command, with each level of management having authority over the level below it and reporting to the level above it. A clear chain of command ensures that communication and decision-making are efficient and that tasks and responsibilities are clearly assigned.