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 'Citigroup Inc. business entity identifier'? Context: registration identifier assigned by the Delaware Department of Corporations for Citigroup Inc.

A. legal entity identifier
B. employer identification number
C. registration identifier
D. business party prefix

Answer: registration identifier