Question:A data warehouse is a "subject-oriented, integrated, time-variant, non-volatile collection of data in support of management's decision-making process". The term non-volatile means that: 

A The data is refreshed often 
B The data is backed up often 
C The data is deleted often 
D The data is rarely changed 
E The data is of low volume 

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A 

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Md. Habib Ullah

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