A DevOps Engineer Is Scheduling Legacy AWS KMS Keys for Deletion

A DevOps engineer is scheduling legacy AWS KMS keys for deletion and has created a remediation AWS Lambda function that will re-enable a key if necessary. The engineer wants to automate this process with available AWS CloudTrail data so, if a key scheduled for deletion is in use, it will be re-enabled. Which solution enables this automation?

A) Create an Amazon CloudWatch Logs metric filter and alarm for KMS events with an error message. Set the remediation Lambda function as the target of the alarm.
B) Create an Amazon CloudWatch Logs metric filter and alarm for KMS events with an error message. Create an Amazon SNS topic as the target of the alarm. Subscribe the remediation Lambda function to the SNS topic.
C) Create an Amazon CloudWatch Events rule pattern looking for KMS service events with an error message. Create an Amazon SNS topic as the target of the rule. Subscribe the remediation Lambda function to the SNS topic.
D) Use Amazon CloudTrail to alert for KMS service events with an error message. Set the remediation Lambda function as the target of the rule.