The correct answer is: C. Revisions
The Control Toolbox, Slides, and Reviewing toolbars can all be toggled from View >> Toolbars. The Revisions toolbar, however, cannot be toggled from View >> Toolbars. This is because the Revisions toolbar is a contextual toolbar, which means that it only appears when you are in a specific mode or working with a specific type of content. In the case of the Revisions toolbar, it only appears when you are in Review mode and working with a document that has been revised.
The Control Toolbox toolbar contains buttons for common tasks such as formatting text, inserting images, and creating tables. The Slides toolbar contains buttons for navigating through a presentation and managing slides. The Reviewing toolbar contains buttons for reviewing and editing documents.
The Revisions toolbar contains buttons for viewing and managing revisions to a document. These buttons include buttons for accepting or rejecting revisions, comparing different versions of a document, and tracking changes.