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

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

A. fragmentation process
B. generically dependent continuant
C. neurotransmitter
D. material entity

Answer: material entity