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

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

A. material entity
B. fluctuating
C. construction
D. excretion

Answer: material entity