Which of the following descriptions about the development of cloud computing architecture is wrong?

Which of the following descriptions about the development of cloud computing architecture is wrong?
A . Resource pools move from small-scale resource virtualization integration to larger-scale resource pool construction
B. Cloud platform and cloud management software from closed source and closed to open source and open
C. From non-critical applications to enterprise-critical applications
D. Data form from unstructured and semi-structured to structured

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Answer: D