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

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

A. mantle
B. mountain gap wind
C. wavelength
D. advection fog

Answer: wavelength