A developer is monitoring an application running on an Amazon EC2 instance. The application accesses an Amazon DynamoDB table and the developer has configured a custom Amazon CloudWatch metric with data granularity of 1 second. If there are any issues, the developer wants to be notified within 30 seconds using Amazon SNS.
Which CloudWatch mechanism will satisfy this requirement?

A. Configure a high-resolution CloudWatch alarm.
B. Set up a custom AWS Lambda CloudWatch log.
C. Use a Cloud Watch stream.
D. Change to a default CloudWatch metric.