You need to ensure that sales department users can create sites. You grant sales department users permissions to create personal sites in the Does the solution meet the goal?

The 'Create Personal Site' permission is configured in the User Profile Service Application and directly controls whether users can create My Site personal sites. Granting this permission to the sales department users satisfies the requirement by giving them the ability to create sites tied to their user profiles.

Incorrect because the 'Create Personal Site' permission is the specific SharePoint control that authorizes users to provision personal sites, and granting it directly fulfills the stated goal.