You are a systems administrator and you need to monitor the health of your production environment. You
decide to do this using Cloud Watch, however you notice that you cannot see the health of every important
metric in the default dash board. Which of the following metrics do you need to design a custom cloud watch
metric for, when monitoring the health of your EC2 instances?

A.
CPU Usage

B.
Memory usage

C.
Disk read operations

D.
Network in

E.
Estimated charges