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

Which of the following classes does 'Lux CSD' belong to as one valid explicit type? Context: Lux CSD functional entity, which provides Luxembourg's financial community with issuing and central bank settlement as well as custody services for a wide range of securities including investment funds

A. data processing servicer
B. bank holding company
C. crypto asset services provider
D. central securities depository

Answer: central securities depository