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What is the recommended approach for migrating a large retail and ecommerce company's relational database to Google Cloud, ensuring scalability, low-latency transactions, and reliability while maintaining the existing schema for sales transactions and inventory data?
A
Store your data in Firestore in a multi-region location, and place your compute resources in one of the constituent regions.
B
Deploy Cloud Spanner using a multi-region instance, and place your compute resources close to the default leader region.
C
Build an in-memory cache in Memorystore, and deploy to the specific geographic regions where your application resides.
D
Deploy a Bigtable instance with a cluster in one region and a replica cluster in another geographic region.