A user has enabled detailed CloudWatch metric monitoring on an Auto Scaling group. Which of the below mentioned
metrics will help the user identify the total number of instances in an Auto Scaling group cluding pending, terminating and
running instances?

A.
GroupTotalInstances

B.
GroupSumInstances

C.
It is not possible to get a count of all the three metrics together. The user has to find the individual number of running, terminating and
pending instances and sum it.

D.
GroupInstancesCount

Explanation:
CloudWatch is used to monitor AWS as well as the custom services. For Auto Scaling, CloudWatch provides various
metrics to get the group information, such as the Number of Pending, Running or Terminating instances at any moment.
If the user wants to get the total number of Running, Pending and Terminating instances at any moment, he can use the
GroupTotalInstances metric.