A company uses Reserved Instances to run its data-processing workload

The nightly job typically takes 7 hours to run and must finish within a 10-hour time window. The company anticipates temporary increases in demand at the end of each month that will cause the job to run over the time limit with the capacity of the current resources. Once started, the processing job cannot be interrupted before completion. The company wants to implement a solution that would allow it to provide increased capacity as cost-effectively as possible.

What should a solutions architect do to accomplish this?

1. Deploy On-Demand Instances during periods of high demand.
2. Create a second Amazon EC2 reservation for additional instances.
3. Deploy Spot Instances during periods of high demand.
4. Increase the instance size of the instances in the Amazon EC2 reservation to support the increasedworkload.