Answer :
- Amazon CloudWatch Logs
- Amazon Cloudtrail
Explanation :
AWS CloudTrail is a service that enables governance, compliance, operational auditing, and risk auditing of your AWS account. With CloudTrail, you can log, continuously monitor, and retain account activity related to actions across your AWS infrastructure. CloudTrail provides event history of your AWS account activity, including actions taken through the AWS Management Console, AWS SDKs, command line tools, and other AWS services. This event history simplifies security analysis, resource change tracking, and troubleshooting.
Option B is incorrect because VPC flow logs can only check for flow to instances in a VPC
Option C is incorrect because this can check for configuration changes only