An e-learning start-up providing school students with practice tests needs to run an application during the holiday season (2 months). The application will be deployed on an EC2 instance; however, the application downtime will have an adverse effect on the company`s reputation. Which option below would be the best fit for this scenario?

Answer options:

A.Reserved
B.Dedicated
C.Spot
D.On-Demand

Answer: D
Option A is incorrect. The required duration of 2 months is not long enough to reserve an instance.
Option B is incorrect. Dedicated instances are not cost-efficient and will not be suggested in this scenario.
Option C is incorrect. Spot instances would not be an apt choice, as there is a probability of disruption.
Option D is Correct. On-Demand instances would be a correct choice, as RIs could not be opted. Because of the terms mentioned, dedicated instances would be costly and with spot instances, there are chances of disruption.
References:
https://aws.amazon.com/ec2/pricing/reserved-instances/
https://aws.amazon.com/ec2/pricing/dedicated-instances/
https://aws.amazon.com/ec2/spot/
https://aws.amazon.com/ec2/pricing/on-demand/