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

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

A. independent continuant
B. occurrent
C. allergen
D. amount

Answer: independent continuant