Which AWS services should the user configure in this case?

A user is running a webserver on EC2. The user wants to receive the SMS when the EC2 instance utilization is above
the threshold limit. Which AWS services should the user configure in this case?

A.
AWS CloudWatch + AWS SES.

B.
AWS CloudWatch + AWS SNS.

C.
AWS CloudWatch + AWS SQS.

D.
AWS EC2 + AWS Cloudwatch.

Explanation:
Amazon SNS makes it simple and cost-effective to push to mobile devices, such as iPhone, iPad, Android, Kindle Fire,
and internet connected smart devices, as well as pushing to other distributed services. In this case, the user can configure
that Cloudwatch sends an alarm on when the threshold is crossed to SNS which will trigger an SMS.
http://aws.amazon.com/sns/