What is the surface oil distribution amount categorized as 'broken'?

The correct categorization for surface oil distribution labeled as 'broken' refers to the condition where oil is present over a significant portion of the surface area, typically ranging from 51% to 90%. This means that the distribution of oil does not cover the surface uniformly but is present in varying concentrations across the area. In the context of oil spill assessments, this classification is crucial as it helps responders understand the extent and severity of the spill, influencing containment and cleanup strategies. A 'broken' distribution indicates that there are substantial, albeit uneven, patches of oil, requiring targeted response efforts to effectively address the pollution.