单选题
You are designing an upgrade strategy for a Windows Azure application that includes one web role with one instance. You have the following requirements： - Test the application on the Windows Azure platform. - Ensure that application upgrades can be rolled back. - Ensure that upgrade and rollback processes do not cause downtime. You need to recommend an approach for upgrading the application. What should you recommend？（）
发布日期：2021-03-17
A
Deploy to the Production slot. Test the application， and then perform a VIP swap.
B
Deploy to the Staging slot. Test the application， and then perform a VIP swap.
C
Deploy to the Staging slot. Test the application， and then perform a manual in-place upgrade to the Production slot.
D
Deploy to the Staging slotTest the application， and then perform an automatic in-place upgrade to the Production slot.
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