Which of the following describes a policy for hydrant placement?

The choice that indicates a policy for hydrant placement as being 300 to 600 feet apart is correct due to established guidelines in fire protection and municipal planning that aim to provide optimal access to water in emergencies. This distance ensures that firefighters can quickly locate and utilize a fire hydrant within a reasonable range when responding to fires, which is crucial for effective firefighting operations.

The distance of 300 to 600 feet allows for adequate coverage in residential and commercial areas, ensuring that hydrants are neither too far apart nor too close, which could lead to inefficient use of resources. This policy reflects the balance between accessibility and operational effectiveness, as well as considerations of water flow requirements and urban development patterns.

In contrast, the other options represent distances that do not align with common fire safety standards, either being too close or too far apart, which may hinder firefighting capabilities. Therefore, policymakers often opt for the range of 300 to 600 feet for hydrant placements to ensure safety and efficiency in emergency response.