Task: Inferred Instance Class Reasoning (ontology: Business_Finance/Financial_Industry_Business_Ontology)

After reasoning over the ontology, which class is one valid inferred class for the instance '742718109'? Context: The Proctor & Gamble Company common share CUSIP

A. operating-level market identifier
B. proprietary security identifier
C. international securities identification number
D. birth certificate identifier

Answer: proprietary security identifier