This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to download an app on a samsung galaxy
Go to settings.
Have a google account on your device. In order to be able to download apps from the play store, you will have to have a google account registered on your device.

Choose from:
(I) The settings for this account can be found in the sources section of the store. This allows you to run the app without needing an apple id on your device.;
(II) If you don't already have one, you can download in itunes. If you don't already have an account, you can use itunes.;
(III) The app icon looks like a half-moon. This means google play is backed up and linked to your device in the play store.;
(IV) Access the settings app by swiping down from the top of your screen to get the notification panel. Tap the settings icon at the upper right corner to launch the settings app.;
The answer is:
(IV)