What is the most likely reason from the possible choices below for this?

You are architecting a highly-scalable and reliable web application which will have a huge amount of

content .You have decided to use Cloudfront as you know it will speed up distribution of your static and dynamic web content and know that Amazon CloudFront integrates with Amazon CloudWatch metrics so that you can monitor your web application. Because you live in Sydney you have chosen the the Asia Pacific (Sydney) region in the AWS console.

However you have set up this up but no CloudFront metrics seem to be appearing in the CloudWatch console.

What is the most likely reason from the possible choices below for this?
A . Metrics for CloudWatch are available only when you choose the same region as the application you are monitoring.
B . You need to pay for CloudWatch for it to become active.
C . Metrics for CloudWatch are available only when you choose the US East (
D . Virginia)
E . Metrics for CloudWatch are not available for the Asia Pacific region as yet.

Answer: C

Explanation:

CloudFront is a global service, and metrics are available only when you choose the US East (N. Virginia) region in the AWS console. If you choose another region, no CloudFront metrics will appear in the CloudWatch console.

Reference: http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/monitoring-using-cloudwatch.html