单项选择题

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.