A company collects application data for analytics. For the first 90 days the data will be accessed infrequently but must be highly available with millisecond retrieval. After 90 days, the data must be retained long term at lower cost, with retrieval time under 5 hours. Which storage lifecycle design is the most cost-effective while meeting these requirements?

The correct option leverages S3 Standard-Infrequent Access (S3 Standard-IA) for the first 90 days because it offers high availability and millisecond retrieval, suitable for infrequently accessed data. After 90 days, transitioning to S3 Glacier Flexible Retrieval is cost-effective for long-term retention with retrieval times under 5 hours. Storing data in S3 One Zone-Infrequent Access is cheaper but lacks the high availability of S3 Standard-IA, making it unsuitable for the initial 90-day requirement. S3 Glacier Deep Archive has retrieval times up to 12 hours, exceeding the 5-hour requirement. Keeping data in S3 Standard for the first 90 days would be more expensive than S3 Standard-IA for infrequently accessed data. Transitioning to S3 Glacier Deep Archive from S3 Standard would also violate the retrieval time constraint.