D. AWS Config
Explanation :
AWS Config can be used to audit, evaluate configurations of AWS resources. If there are any operational issues, AWS config can be used to retrieve configurational changes made to AWS resources that may have caused these issues.
Option A is incorrect as Amazon Inspector can be used to analyze potential security threats for an Amazon EC2 instance against an assessment template with predefined rules. It does not provide historical data for configurational changes done to AWS resources.
Option B is incorrect as AWS CloudFormation provided templates to provision and configure resources in AWS.
Option C is incorrect as AWS Trusted Advisor can help optimize resources with AWS cloud with respect to cost, security, performance, fault tolerance, and service limits. It does not provide historical data for configurational changes done to AWS resources.
For more information on AWS Config, refer to the following URL:https://docs.aws.amazon.com/config/latest/developerguide/WhatIsConfig.html
