A Company Runs an Application in the AWS Cloud and Uses

A company runs an application in the AWS Cloud and uses Amazon DynamoDB as the database. The company deploys Amazon EC2 instances to a private network to process data from the database. The company uses two NAT instances to provide connectivity to DynamoDB. The company wants to retire the NAT instances. A solutions architect must implement a solution that provides connectivity to DynamoDB and that does not require ongoing management. What is the MOST cost-effective solution that meets these requirements?

A) Create a gateway VPC endpoint to provide connectivity to DynamoDB.
B) Configure a managed NAT gateway to provide connectivity to DynamoDB.
C) Establish an AWS Direct Connect connection between the private network and DynamoDB.
D) Deploy an AWS PrivateLink endpoint service between the private network and DynamoDB.