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

Which of the following classes does 'Citibank, N.A. date insured' belong to as one valid explicit type? Context: date that Citibank, N.A. (as First National City Bank Of New York) was initially insured with respect to deposit insurance by the FDIC

A. relative date
B. proper interval
C. occurrence-based date
D. explicit date

Answer: explicit date