A user has setup a billing alarm using CloudWatch for $200. The usage of AWS exceeded $200 after some days. The
user wants to increase the limit from $200 to $400. What should the user do?

A.
Create a new alarm of $400 and link it with the first alarm

B.
It is not possible to modify the alarm once it has crossed the usage limit

C.
Update the alarm to set the limit at $400 instead of $200

D.
Create a new alarm for the additional $200 amount

Explanation:
AWS CloudWatch supports enabling the billing alarm on the total AWS charges. The estimated charges are calculated
and sent several times daily to CloudWatch in the form of metric data. This data will be stored for 14 days. This data also
includes the estimated charges for every service in AWS used by the user, as well as the estimated overall AWS charges.
If the user wants to increase the limit, the user can modify the alarm and specify a new threshold.