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

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

A. Contract modification
B. Contract procedure
C. Contract additional obligations
D. Tender committee

Answer: Contract modification