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

The property 'vessel supplies blood to' applies to instances of 'blood vessel', and 'appendage blood vessel' is a subclass of 'blood vessel'. Which class can appear as the value of 'vessel supplies blood to' for instances of 'appendage blood vessel'?

A. vesicle targeting
B. steroid binding
C. regulation of postsynaptic membrane potential
D. anatomical structure

Answer: anatomical structure