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

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

A. mountain plain wind
B. wavelength
C. loop current
D. granule

Answer: wavelength