What type of sources can Power BI connect to?

Power BI is designed to connect to a wide variety of data sources, making option B the correct choice. This flexibility allows users to bring in data from file sources such as Excel spreadsheets, CSV files, and text files, as well as from various databases, including both relational and non-relational databases like SQL Server, Oracle, and others. Additionally, Power BI can connect to multiple online services, such as Azure services, Google Analytics, and various APIs, allowing for comprehensive data integration from various platforms.

This versatility enables users to create reports and dashboards that consolidate data from disparate sources, offering a holistic view of their data landscape. The ability to connect to such a broad spectrum of sources is a key feature that enhances Power BI's usability and effectiveness for data analysis and visualization.

Other options are limited in scope. The option stating only cloud services would exclude local file sources and traditional databases. The choice mentioning Excel sheets exclusively significantly narrows down the range of data sources to just one specific type, neglecting many others that are essential for diverse reporting needs. Lastly, focusing only on relational databases overlooks the variety of other data sources that can also be utilized effectively within Power BI.