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

The property 'determined by' applies to instances of 'system', and 'conveyor system' is a subclass of 'system'. Which class can appear as the value of 'determined by' for instances of 'conveyor system'?

A. signalling molecule
B. decreased quality
C. multi-species collection of microbes
D. material entity

Answer: material entity