An Audit Determined That a Company's Amazon EC2 Instance Security

Multiple Choice

An audit determined that a company's Amazon EC2 instance security group violated company policy by allowing unrestricted incoming SSH traffic. A security engineer must implement a near-real-time monitoring and alerting solution that will notify administrators of such violations. Which solution meets these requirements with the MOST operational efficiency?

A) Create a recurring Amazon Inspector assessment run that runs every day and uses the Network Reachability package. Create an Amazon CloudWatch rule that invokes an AWS Lambda function when an assessment rum starts. Configure the Lambda function to retrieve and evaluate the assessment run report when it completes. Configure the Lambda function also to publish an Amazon Simple Notification Service (Amazon SNS) notification is there are any violations for unrestricted incoming SSH traffic.
B) Use the restricted-ssh AWS Config managed rule that is invoked by security group configuration changes that are not compliant. Use the AWS Config remediation feature to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic.
C) Configure VPC Flow Logs for the VPC, and specify an Amazon CloudWatch Logs group. Subscribe the CloudWatch Logs group to an AWS Lambda function that parses new log entries, detects successful connections on port 22, and publishes a notification through Amazon Simple Notification Service (Amazon SNS) .
D) Create a recurring Amazon Inspector assessment run that runs every day and uses the Security Best Practices package. Create an Amazon CloudWatch rule that invokes an AWS Lambda function when an assessment rum starts. Configure the Lambda function to retrieve and evaluate the assessment run report when it completes. Configure the Lambda function also to publish an Amazon Simple Notification Service (Amazon SNS) notification is there are any violations for unrestricted incoming SSH traffic.