Which of the following is not a primary advantage of Microsoft's self-service BI tools?

a. They allow ordinary Excel users to perform powerful data analysis without needing help from a corporate IT department.

b. The tools let you analyze the data in Excel. However, you must first create a relational database in a database package such as Access.

c. To analyze large relatable tables in Excel, the usual practice of employing multiple VLOOKUP functions is no longer required.

d. These tools allow you to analyze data sets in Excel that go well beyond Excel's approximately one million row limit.