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

Which of the following classes does 'Mastercard network' belong to as one valid explicit type? Context: credit card network that has its own suite of card protections and benefits, such as identity theft protection and extended warranties

A. secondary unit designator
B. maturity level
C. occurrence kind
D. credit card network

Answer: credit card network