A SysOps Administrator Is Required to Monitor Free Space on Amazon

A SysOps Administrator is required to monitor free space on Amazon EBS volumes attached to Microsoft Windows-based Amazon EC2 instances within a company's account. The Administrator must be alerted to potential issues. What should the Administrator do to receive email alerts before low storage space affects EC2 instance performance?

A) Use built-in Amazon CloudWatch metrics, and configure CloudWatch alarms and an Amazon SNS topic for email notifications
B) Use AWS CloudTrail logs and configure the trail to send notifications to an Amazon SNS topic
C) Use the Amazon CloudWatch agent to send disk space metrics, then set up CloudWatch alarms using an Amazon SNS topic
D) Use AWS Trusted Advisor and enable email notification alerts for EC2 disk space