Which input type should you use for the reference data?

You are developing a solution that will stream to Azure Stream Analytics. The solution will have both streaming data and reference data.

Which input type should you use for the reference data?
A . Azure Cosmos DB
B . Azure Blob storage
C . Azure IoT Hub
D . Azure Event Hubs

Answer: B

Explanation:

Stream Analytics supports Azure Blob storage and Azure SQL Database as the storage layer for Reference Data.

Reference: https://docs.microsoft.com/en-us/azure/stream-analytics/stream-analytics-use-reference-data