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

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

A. day
B. material entity
C. soil profile characterization
D. tracer

Answer: material entity