Task: Property Constraint Reasoning (ontology: Legal/Public_Procurement_Ontology)

The property 'Complementary contract' applies to instances of 'Public contract', and 'Multiannual contract' is a subclass of 'Public contract'. Which class can appear as the value of 'Complementary contract' for instances of 'Multiannual contract'?

A. Briefing
B. Public contract
C. Electronic auction phase
D. Procedure void

Answer: Public contract