Task: Property Constraint Reasoning (ontology: Sciences/Conference)

The property 'has a committee co-chair' applies to instances of 'Committee', and 'Steering committee' is a subclass of 'Committee'. Which class can appear as the value of 'has a committee co-chair' for instances of 'Steering committee'?

A. Conference participant
B. Co-chair
C. Invited speaker
D. Written contribution

Answer: Co-chair