B and E are the correct answers because they allow the solutions architect to ensure that API calls to Amazon DynamoDB from Amazon EC2 instances in a VPC do not travel across the internet. By creating a gateway endpoint for DynamoDB, the solutions architect can enable private connectivity between the VPC and DynamoDB. By creating a security group entry in the endpoint’s security group to provide access, the solutions architect can control which EC2 instances can communicate with DynamoDB through the endpoint. References:
Gateway Endpoints
Controlling Access to Services with VPC Endpoints
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