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

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

A. inorganic salt
B. bicyclic compound
C. anatomical structure
D. response to external stimulus

Answer: anatomical structure