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How should a solutions architect migrate a continuously operating legacy application with increasing database storage from an on-premises data center to AWS Cloud in the most cost-effective manner?
A
Use Amazon EC2 Spot Instances for the application layer and Amazon S3 for data storage.
B
Use Amazon EC2 Reserved Instances for the application layer and Amazon RDS On-Demand for data storage.
C
Use Amazon EC2 Reserved Instances for the application layer and Amazon Aurora Reserved for data storage.
D
Use Amazon EC2 On-Demand Instances for the application layer and Amazon RDS Reserved for data storage.
