Which of the following descriptions about Hybrid Cloud is incorrect?

Which of the following descriptions about Hybrid Cloud is incorrect?
A . The heavy traffic that occurs during the holiday and promotional periods can be transferred to public clouds in a flexible and quick way, meeting the demands of resource expansion and enhancing user experience
B . Once public clouds have been connected with private clouds, the service is ready
C . Hybrid cloud solution in data security, and regulation compliance, and rationality of the expense has very obvious advantages
D . Core data analysis can be completed on public clouds, which is reliable and secure

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Answer: D