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How can you optimize a production Cloud Spanner database instance to reduce costs while ensuring high reliability and availability?
A
Use Cloud Logging to check for error logs, and reduce Spanner processing units by small increments until you find the minimum capacity required.
B
Use Cloud Trace to monitor the requests per sec of incoming requests to Spanner, and reduce Spanner processing units by small increments until you find the minimum capacity required.
C
Use Cloud Monitoring to monitor the CPU utilization, and reduce Spanner processing units by small increments until you find the minimum capacity required.
D
Use Snapshot Debugger to check for application errors, and reduce Spanner processing units by small increments until you find the minimum capacity required.