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

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

A. anatomical structure
B. tooth bud
C. lipid binding
D. cellular developmental process

Answer: anatomical structure