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

The property 'farther than' applies to instances of 'distance', and 'gyroradius' is a subclass of 'distance'. Which class can appear as the value of 'farther than' for instances of 'gyroradius'?

A. warm front
B. phenology
C. picophytoplankton
D. distance

Answer: distance