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A company runs a web application on Amazon EC2 instances behind an Application Load Balancer...

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A company runs a web application on Amazon EC2 instances behind an Application Load Balancer ALB. The application uses Amazon DynamoDB as its database. The company wants to ensure high performance for reads and writes.

Which solution will meet this requirement MOST cost-effectively?

A.

Configure automatic scaling for the DynamoDB table. Set a target utilization of 70%. Set the minimum and maximum capacity units based on the expected workload.

B.

Analyze the DynamoDB table usage. Create a global secondary index GSI on the existing table for frequently used keys. Assign read and write capacity units appropriately.

C.

Use DynamoDB provisioned throughput mode for the table. Create an Amazon CloudWatch alarm for the ThrottledRequests metric. Invoke an AWS Lambda function to increase provisioned capacity.

D.

Create an Amazon DynamoDB Accelerator DAX cluster. Configure the application to use the DAX endpoint.

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