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

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

A. spatial source
B. geometrical object
C. duration
D. stellar atmosphere

Answer: geometrical object