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To enhance the resilience of an application making batch requests to Amazon DynamoDB via the BatchGetItem API, which actions should be taken when the response includes UnprocessedKeys?
A
Immediately retry the batch operation.
B
Implement exponential backoff and randomized delay for batch operation retries.
C
Utilize AWS SDK for request handling.
D
Augment the provisioned read capacity for accessed DynamoDB tables.
E
Raise the provisioned write capacity for accessed DynamoDB tables.
