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

The property 'has qualifier' applies to instances of 'Measured Characteristic', and 'VolumetricRate' is a subclass of 'Measured Characteristic'. Which class can appear as the value of 'has qualifier' for instances of 'VolumetricRate'?

A. Standard
B. Characteristic Qualifier
C. Measurement Value
D. Characteristic

Answer: Characteristic Qualifier