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单项选择题As part of fallover testing of a corporate database server， client application connectivity must be  verified. Which of the following would best verify the application functionality？（）  

A、 Perform a ping client verification test.

B、 Review the number of active application processes.

C、 Perform successful reads and writes to the application.

D、 Run netstat -an to verify client connections to the listening ports.

  • C

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