Task: Property Constraint Reasoning (ontology: Earth_Environment/SWEET)

The property 'has area' applies to instances of 'geometrical object 2d', and 'star' is a subclass of 'geometrical object 2d'. Which class can appear as the value of 'has area' for instances of 'star'?

A. Shabaite (Nd)
B. Reichenbachite
C. Okanoganite (Y)
D. area

Answer: area