Task: Property Constraint Reasoning (ontology: Sciences/Biology)

The property 'has role' applies to instances of 'independent continuant', and 'hydroxide' is a subclass of 'independent continuant'. Which class can appear as the value of 'has role' for instances of 'hydroxide'?

A. physical quality of a process
B. role
C. biological process involved in interspecies interaction between organisms
D. ionic polymer

Answer: role