What should be done after clicking the OK button in the Trust Center dialog for adding trusted locations?

After clicking the OK button in the Trust Center dialog for adding trusted locations, the appropriate action is to return to the Excel Options dialog. This is because when you confirm changes in the Trust Center, including adding trusted locations, it is important to ensure that these settings are saved and that the Excel Options interface allows you to further adjust or finalize any other settings you may need to modify before exiting.

While accessing a new workbook or backup settings may seem relevant after adjusting trust settings, they are not directly linked to the immediate next step following modifications in the Trust Center. Clicking Cancel would simply exit the dialog without saving any changes made, which goes against the purpose of adding trusted locations. Hence, returning to the Excel Options dialog allows the user to continue managing Excel settings comprehensively.