If the user wants to simulate the alarm action how can he achieve this?

A user has setup a CloudWatch alarm on an EC2 action when the CPU utilization is above 75%. The alarm sends a notification to SNS on the alarm state.

If the user wants to simulate the alarm action how can he achieve this?
A . Run activities on the CPU such that its utilization reaches above 75%
B . From the AWS console change the state to ‘Alarm’
C . The user can set the alarm state to ‘Alarm’ using CLI
D . Run the SNS action manually

Answer: C

Explanation:

Amazon CloudWatch alarms watch a single metric over a time period that the user specifies and performs one or more actions based on the value of the metric relative to a given threshold over a number of time periods. The user can test an alarm by setting it to any state using the SetAlarmState API (mon-set-alarm-state command. This temporary state change lasts only until the next alarm comparison occurs.