Which setting should you check to find out if ACME manages her iPhone?

This is the correct setting to check if an iPhone is managed by an organization, such as ACME. A profile is a file that contains settings and policies that can be installed on an iPhone to control its features and behavior. A profile can be installed by an organization to manage the device remotely, or by the user to customize the device. A profile can also indicate that the device is supervised, which means that the organization has more control over the device and can apply extra restrictions. To see if an iPhone has a profile installed, go to Settings > General > Profile & Device Management. If there is no profile, this section will not appear. If there is a profile, tap on it to see what type of changes are made. To learn more about the features changed for your specific organization, ask your administrator whether these settings are enforced. References: Delete unknown configuration profiles from your iPhone or iPad, Get started with a supervised iPhone or iPad, See who has access to your iPhone or iPad, How to check if an iPhone is locked or unlocked