A developer must store customer orders in DynamoDB and the company requires that all data at rest be encrypted using a key generated and managed by the company. What should the developer do to satisfy this requirement?

The correct approach is to store the company's encryption key in AWS Key Management Service (KMS) and then configure the DynamoDB table to use this customer managed key (CMK) for encryption at rest. This directly fulfills the requirement for data to be encrypted with a company-generated and managed key. The first incorrect option, encrypting data in the application, adds unnecessary complexity and overhead, and it doesn't leverage DynamoDB's native encryption features. The third incorrect option, using default encryption with kms:Encrypt in the SDK, is incorrect because default encryption uses an AWS owned key, and the SDK call is not how you specify a CMK for table encryption. The fourth incorrect option, choosing an AWS-managed KMS key, does not meet the requirement for a company-generated and managed key, as AWS-managed keys are managed by AWS.