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

The property 'has restoring force' applies to instances of 'wave', and 'longitudinal wave' is a subclass of 'wave'. Which class can appear as the value of 'has restoring force' for instances of 'longitudinal wave'?

A. management
B. stellar realm
C. chemical state
D. phenomena

Answer: phenomena