Which of the following are possible actions for FortiGuard web category filtering? (Choose three.)

`Allow` is a basic action that permits users to access websites falling into a specified web category without further intervention.

`Block` is a fundamental action that prevents users from accessing websites within a designated web category.

`Exempt` is not a standard, explicit action for web filtering categories; instead, exceptions are usually configured by overriding categories or creating specific URL filters.

`Warning` displays a message to the user that they are accessing a potentially objectionable site and requires them to acknowledge before proceeding.

`Shape` is a traffic management action related to bandwidth control, not directly an action for categorizing and controlling access to web content.