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

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

A. material entity
B. duration
C. Lewis acid
D. system process

Answer: material entity