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

The property 'determined by part of' 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 part of' for instances of 'carbonate system of ocean water'?

A. food additive
B. object aggregate
C. electron donor
D. material entity

Answer: material entity