Option A is correct because S3 Standard-Infrequent Access (S3 Standard-IA) is designed for data that is accessed less frequently but requires rapid access when needed. It offers a lower storage cost while still providing high durability, availability, and performance. S3 Glacier Deep Archive with standard retrieval is the most cost-effective option for archival storage in AWS and it meets the requirement of access within 24 hours as standard retrieval typically returns data within 12 hours. Options that use bulk retrieval (such as B and D) do not meet the 24-hour retrieval requirement, and using S3 One Zone-IA does not maximize resiliency.