The question requires three complete solutions for transferring data into Azure Blob Storage to support Azure Machine Learning. Based on the community discussion with 100% consensus on BCD and detailed reasoning: B (AzCopy) is a command-line utility specifically designed for Azure storage transfers; C (Python script) can use Azure Blob Storage SDK/API for programmatic data transfer; D (Azure Storage Explorer) provides a GUI-based approach for file transfers. Options A (Bulk Insert SQL Query) and E (Bulk Copy Program/BCP) are incorrect as they are SQL Server-specific tools not directly used for transferring data to Azure Blob Storage.