A company has Linux-based Amazon EC2 instances. Users must access the instances by using SSH with EC2 SSH key pairs. Each machine requires a unique EC2 key pair. The company wants to implement a key rotation policy that will, upon request, automatically rotate all the EC2 key pairs and keep the keys in a securely encrypted place. The company will accept less than 1 minute of downtime during key rotation. Which solution will meet these requirements? A. Store all the keys in AWS Secrets Manager. Define a Secrets Manager rotation schedule to invoke an AWS Lambda function to generate new key pairs. Replace public keys on EC2 instances. Update the private keys in Secrets Manager. B. Store all the keys in Parameter Store, a capability of AWS Systems Manager, as a string. Define a Systems Manager maintenance window to invoke an AWS Lambda function to generate new key pairs. Replace public keys on EC2 instances. Update the private keys in Parameter Store. C. Import the EC2 key pairs into AWS Key Management Service (AWS KMS). Configure automatic key rotation for these key pairs. Create an Amazon EventBridge scheduled rule to invoke an AWS Lambda function to initiate the key rotation in AWS KMS. D. Add all the EC2 instances to Fleet Manager, a capability of AWS Systems Manager. Define a Systems Manager maintenance window to issue a Systems Manager Run Command document to generate new key pairs and to rotate public keys to all the instances in Fleet Manager.