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

The property 'characteristic for' applies to instances of 'Characteristic', and 'Identifying Characteristic' is a subclass of 'Characteristic'. Which class can appear as the value of 'characteristic for' for instances of 'Identifying Characteristic'?

A. Entity
B. Measurement Type
C. Unit Conversion
D. Observation Collection

Answer: Entity