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A team is designing a DynamoDB table keyed on customerId (partition key) and orderDate (sort key). They also need to query the same items by a different sort attribute, totalAmount, while keeping the same partition key, and they require strongly consistent reads on that alternate query. Which index should they create, and when?

A

A Local Secondary Index, which must be created at table creation time

B

A DAX cluster on totalAmount

C

A second base table replicated via Streams

D

A Global Secondary Index, which can be added at any time

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