The correct answers are A and D. When a company migrates its IT infrastructure to AWS Cloud, it can eliminate the costs associated with data center operations (A) because AWS provides the necessary infrastructure and the company no longer needs to manage its own data centers. Additionally, the cost of physical server hardware (D) is also eliminated, as AWS offers virtualized instances that can be scaled as needed, reducing the need for upfront hardware purchases and maintenance costs. Options B, C, and E are not directly related to the migration to AWS Cloud and do not represent costs that would be eliminated by such a migration.