OLAP is a tool for enabling:

OLAP, or Online Analytical Processing, is primarily designed to allow users to obtain rapid responses to ad-hoc queries regarding large sets of data. This capability is essential for analytical purposes, as it enables decision-makers to explore complex data relationships and patterns without extensive delays. By providing swift access to analytical data, OLAP helps organizations in making informed decisions based on timely insights.

The tool is structured to support various types of analytical operations, including slicing, dicing, and drilling down into data. This functionality caters to users' needs for immediate and flexible answers to their specific questions, enhancing their ability to analyze information dynamically.

In contrast, the other options center around different aspects of data management and analysis. Viewing logical and physical views of data pertains more to database design and data modeling, rather than the analytical focus of OLAP. Diagramming data relationships is a function that typically aligns with data modeling tools, and normalizing data involves structuring databases to minimize redundancy and dependency, which is not the primary goal of OLAP. Thus, option A correctly aligns with the capabilities of OLAP as a rapid-query tool for users seeking detailed analytical insights.