Task: Instance Class Understanding (ontology: Business_Finance/Financial_Industry_Business_Ontology)

Which of the following classes does 'Citibank, N.A. RSSD identifier' belong to as one valid explicit type? Context: research statistics supervision discount identifier (RSSD ID), assigned by the Federal Reserve to Citibank, N.A.

A. value-added tax identification number
B. contextual identifier
C. Research, Statistics, Supervision and Regulation, and Discount and Credit identifier
D. taxpayer identification number

Answer: Research, Statistics, Supervision and Regulation, and Discount and Credit identifier