Which option must be selected on the General tab of the Workbook properties to restrict a user to a specific scenario?

Selecting the option to "Limit the available scenarios" on the General tab of the Workbook properties is essential for restricting a user to a specific scenario. This choice directly controls which scenarios a user can access within the workbook. When this option is enabled, it allows the author to specify exactly which scenarios are visible and available for selection by the user. This selective access is crucial in scenarios where you want users to work within defined parameters, ensuring they only modify or view specific data relevant to their tasks or roles without confusion or unintended changes across other scenarios.

In contrast, the other options serve different purposes. Hiding the scenario control merely removes the user interface element that allows scenario selection, but it doesn't restrict access; the user could still technically interact with scenarios if needed. Including private child scenarios relates more to the visibility of scenarios that are classified as private, rather than limiting user access to selective scenarios. Locking workbook layout pertains to the arrangement and protection of the workbook's structure but does not influence scenario accessibility.