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

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

A. material entity
B. indicator
C. multi-species collection of microbes
D. plant structure development stage

Answer: material entity