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

The property 'has substance added' applies to instances of 'material entity', and 'facility' is a subclass of 'material entity'. Which class can appear as the value of 'has substance added' for instances of 'facility'?

A. material entity
B. increased quality
C. neurotoxin
D. genotoxin

Answer: material entity