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

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

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

Answer: Public contract