1. What are the main reasons for the recent popularity of data mining? I. More intense competition at the global scale driven by customers' ever-changing needs and wants in an increasingly saturated marketplace. II. General recognition of the untapped value hidden in large data sources. III. Consolidation and integration of database records, which enables a single view of customers, vendors, transactions, etc. IV. Significant reduction in the cost of hardware and software for data storage and processing. A. I, I B. II, IV C. I, II, III, IV D. I, III, IV

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