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

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

A. season
B. quality
C. ligand
D. material entity

Answer: material entity