IHOP purchased a middleware software package to integrate its data because:

The choice that asserts middleware packages are built for adaptability is the most accurate in this context. Middleware software is specifically designed to facilitate communication and data management between different systems, allowing organizations like IHOP to effectively integrate their data from various sources.

Adaptability is a crucial aspect of middleware, as it can often be adjusted or configured to work with different data formats and systems, thereby accommodating the diverse IT landscape that many businesses operate within. This flexibility enables companies to implement middleware solutions that can evolve alongside their changing needs.

In contrast, the focus on cost in the provided answer does not highlight the primary benefits of a middleware solution. While packaged software can sometimes be more affordable than developing a bespoke solution from scratch, the defining factors for IHOP's purchase would likely revolve around functionality and operational efficiency rather than just cost considerations.

Choosing middleware allows for better management of data integration challenges, ensuring that IHOP can maintain effective operations and streamlined processes across its various platforms.