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A solutions architect is tasked with reviewing the design of an Amazon EMR cluster utilizing the EMR File System (EMRFS). This cluster is essential for business operations as it handles critical tasks. Currently, the cluster operates on Amazon EC2 On-Demand Instances for all task, primary, and core nodes continuously. The EMR tasks initiate daily at 1:00 AM and typically conclude within 6 hours. The urgency of task completion is not critical since the processed data is not accessed until later in the day. The solutions architect is required to propose a cost-effective solution for the compute resources. Which recommendation should the solutions architect make to achieve this goal?
A
Implement Spot Instances for all task, primary, and core nodes within an instance fleet. Terminate the entire cluster, including all instances, upon task completion.
B
Maintain On-Demand Instances for the primary and core nodes. Utilize Spot Instances for the task nodes within an instance fleet. Terminate the cluster, including all instances, post-processing. Acquire Compute Savings Plans to offset the costs of On-Demand Instance usage.
C
Continue using On-Demand Instances for all nodes. Terminate the cluster, including all instances, after processing. Secure Compute Savings Plans to manage the costs of On-Demand Instance usage.
D
Keep On-Demand Instances for the primary and core nodes. Employ Spot Instances for the task nodes within an instance fleet. Only terminate the task node instances following processing. Enroll in Compute Savings Plans to cover the costs of On-Demand Instance usage.