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How can you design a physician portal app in Node.js that maintains functionality during intermittent internet connectivity by querying cached data, while ensuring scalability, strong consistency, and multi-region replication?
A
Use Firestore and ensure that the PersistenceEnabled option is set to true.
B
Use Memorystore for Memcached.
C
Use Pub/Sub to synchronize the changes from the application to Cloud Spanner.
D
Use Table.read with the exactStaleness option to perform a read of rows in Cloud Spanner.
