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

The property 'was a member of' applies to instances of 'Committee member', and 'Co-chair' is a subclass of 'Committee member'. Which class can appear as the value of 'was a member of' for instances of 'Co-chair'?

A. Important dates
B. Committee
C. Organizer
D. Topic

Answer: Committee