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How can you improve the performance of write workloads in a multi-regional Cloud Spanner instance that are significantly slower compared to a regional instance for a write-heavy application?
A
Place the bulk of the read and write workloads closer to the default leader region.
B
Use staleness of at least 15 seconds.
C
Add more read-write replicas.
D
Keep the total CPU utilization under 45% in each region.
