Azure Database Migration Service (DMS) is a fully managed service designed to enable seamless migrations from multiple database sources to Azure data platforms with minimal downtime. The term "shipping data" strongly implies structured data residing in an on-premises database (e.g., SQL Server, Oracle, MySQL). DMS is the specific Azure service built for this purpose, supporting a wide variety of source and target database platforms and handling the complexities of moving database schemas and data.

A. Azure Migrate is a centralized hub for assessing and migrating on-premises servers, apps, and data, but it uses DMS as the underlying engine for database migrations.

B. The Azure Cosmos DB Data Migration tool is exclusively for importing data into Azure Cosmos DB from various sources. The target is not specified as Cosmos DB.

C. AzCopy is a command-line utility for copying files and blobs to or from Azure Storage. It is not designed for migrating structured database data.

1. Azure Database Migration Service Documentation: "What is Azure Database Migration Service?". Microsoft Docs. "Azure Database Migration Service is a fully managed service designed to enable seamless migrations from multiple database sources to Azure data platforms with minimal downtime." This confirms DMS is the primary tool for migrating databases.

2. Azure Migrate Documentation: "About Azure Migrate". Microsoft Docs. Under the "Migration tools" section, it lists Azure Database Migration Service as the tool for "Databases: Assess on-premises databases and migrate them to Azure SQL Database, Azure SQL Managed Instance, or Azure VMs running SQL Server." This shows Azure Migrate orchestrates but DMS performs the migration.

3. AzCopy Documentation: "Get started with AzCopy". Microsoft Docs. "AzCopy is a command-line utility that you can use to copy blobs or files to or from a storage account." This defines its purpose as file/blob transfer, not database migration.

4. Azure Cosmos DB Data Migration Tool Documentation: "Azure Cosmos DB data migration tool". Microsoft Docs. "The Azure Cosmos DB Data Migration tool is an open-source solution that imports data to Azure Cosmos DB from a variety of sources". This highlights its specific use case for Cosmos DB only.