Which of the below mentioned Reserved Instance categories is advised in this case?

A user is running one instance for only 3 hours every day. The user wants to save some cost with the instance.
Which of the below mentioned Reserved Instance categories is advised in this case?

A.
The user should not use RI; instead only go with the on-demand pricing

B.
The user should use the AWS high utilized RI

C.
The user should use the AWS medium utilized RI

D.
The user should use the AWS low utilized RI

Explanation:
The AWS Reserved Instance provides the user with an option to save some money by paying a one-time fixed
amount and then save on the hourly rate. It is advisable that if the user is having 30% or more usage of an
instance per day, he should go for a RI. If the user is going to use an EC2 instance for more than 2200-2500
hours per year, RI will help the user save some cost. Here, the instance is not going to run for less than 1500
hours. Thus, it is advisable that the user should use the on-demand pricing.