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

The property 'has vector' applies to instances of 'vector quantity', and 'stokes parameters' is a subclass of 'vector quantity'. Which class can appear as the value of 'has vector' for instances of 'stokes parameters'?

A. l2
B. pond
C. continous emission monitoring system
D. vector

Answer: vector