Which statement is not correct?

a. Query and reporting tools are an essential component of a comprehensive business intelligence solution.

b. A pivot or cross-table is a popular data summarization tool. It essentially cross-tabulates a set of dimensions.

c. A key disadvantage of OLAP is that it does not allow you to interactively analyze your data, summarize it, and visualize it in various ways.

d. The key fundament of OLAP is a multidimensional data model which can be implemented in various ways.