A Development team has pushed out 10 applications running on several Amazon EC2 instances. The Operations team is asking for a graphical representation of one key performance metric for each application. These metrics should be available on one screen for easy monitoring.
Which steps should the Developer take to accomplish this using Amazon CloudWatch?

A. Create a custom namespace with a unique metric name for each application.
B. Create a custom dimension with a unique metric name for each application.
C. Create a custom event with a unique metric name for each application.
D. Create a custom alarm with a unique metric name for each application.