What role does a user with multiple roles possess regarding data access?

When a user has multiple roles within a system, their data access is usually cumulative based on the permissions associated with each role. This means that as roles are added, the user gains access to more data and functionalities that correspond to the combined permissions from all of their roles.

In this context, option C highlights the idea that the data access of a user aligns with the various roles they hold, providing a broader range of capabilities than a single-role user. This structure is designed to ensure that users can effectively perform their duties by providing them with necessary access that reflects their responsibilities and tasks.

The other options imply scenarios that don't accurately reflect how multiple-role access typically operates. Unlimited access is generally reserved for admin-level users without additional constraints, while restricted access to certain modules and access being limited to a main dashboard do not account for the enhanced access a user gains when holding multiple roles. Thus, option C correctly captures the essence of how data access is structured for users with multiple roles.