A nightly data-processing batch job can be interrupted and resumed without harm, and the company wants the lowest possible compute cost. Which EC2 purchasing option is most appropriate?
A) On-Demand Instances.
B) Spot Instances.
C) A 3-year Reserved Instance.
D) Dedicated Hosts.
Correct Answer: B
Explanation: Spot Instances offer the deepest discounts (often up to ~90% vs On-Demand) and are ideal for fault-tolerant, interruption-tolerant workloads like flexible batch processing. (A) is far more expensive for interruptible work. (C) RIs commit to steady, always-on usage. (D) Dedicated Hosts are the most expensive, for licensing/compliance.