Task: Property Constraint Reasoning (ontology: Earth_Environment/EnvironmentOntology)

The property 'interacts with' applies to instances of 'material entity', and 'object aggregate' is a subclass of 'material entity'. Which class can appear as the value of 'interacts with' for instances of 'object aggregate'?

A. amount of nitrogen atom in environmental material
B. marine biota
C. transient tracer
D. material entity

Answer: material entity