https://www.techtarget.com/searchitoperations/tip/Easily-transfer-VMs-to-the-cloud-with-Microsoft-Azure- Migrate Basic Concept: This question tests choosing the correct Azure migration approach by matching the source platform, target service, downtime tolerance, and administrative effort.
Why C is Correct: Azure Data BOX matches the expected DP-300 administration action. Azure Data BOX is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. The question is not asking for a general Azure capability; it is asking for the feature that produces this result: You need to migrate DB 1 to Azure.
Why A is Wrong: Azure Migrate is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It applies to a different Azure data-platform design than the one the question is testing.
Why B is Wrong: Data Migration Assistant (DMA) is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It would solve a neighboring problem, but not the deployment, sizing, or migration requirement in this item.
Why D is Wrong: Azure Database Migration Service is the managed migration service used to move database engines to Azure targets with online or offline migration modes depending on source and target support. It applies to a different Azure data-platform design than the one the question is testing.