The combination of the user and the assigned portfolio must be unique when adding a...

According to the Stakeholder Registry document, the combination of the user and the assigned portfolio must be unique when adding a user to the stakeholder registry. The stakeholder registry is a table that stores information about the stakeholders of a portfolio. The other options are not correct, as they are not registries that require a unique combination of user and portfolio. The application registry is a table that stores information about the applications in the system. The event registry is a table that stores information about the events that trigger notifications. The UX page registry is a table that stores information about the UX pages that are available for portfolios.