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

The property 'channel for' applies to instances of 'anatomical conduit', and 'Alcock's canal' is a subclass of 'anatomical conduit'. Which class can appear as the value of 'channel for' for instances of 'Alcock's canal'?

A. multicellular organismal-level homeostasis
B. organism substance
C. carbohydrate derivative binding
D. trivalent inorganic anion

Answer: organism substance