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

The property 'skeleton of' applies to instances of 'anatomical structure', and 'ganglion' is a subclass of 'anatomical structure'. Which class can appear as the value of 'skeleton of' for instances of 'ganglion'?

A. inorganic salt
B. anatomical structure
C. adenohypophysis morphogenesis
D. embryonic morphogenesis

Answer: anatomical structure