Explanation/Reference:
Explanation:
To achieve the fastest loading speed for moving data into a data warehouse table, load data into a staging table. Define the staging table as a heap and use round-robin for the distribution option. No such option is available here, however.
Loading into a clustered columnstore is also a known practice for loading data into a data warehouse.
Incorrect Answers:
C: In-Memory OLTP can significantly improve the performance of transaction processing, data ingestion and data load, and transient data scenarios. It does not fit a data warehouse scenario.
References: https://docs.microsoft.com/en-us/azure/sql-data-warehouse/guidance-for-loading-data