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

The property 'has volume' applies to instances of 'geometrical object 3d', and 'tube' is a subclass of 'geometrical object 3d'. Which class can appear as the value of 'has volume' for instances of 'tube'?

A. Polyhalite
B. Felbertalite
C. Fresnoite
D. volume

Answer: volume