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

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

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

Answer: Public contract