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

How to root a galaxy s4
Verify that any personal information saved on your samsung galaxy s4 is backed up.
Rooting your device may result in potential data loss.
Save contacts to your sim card or to google's servers, and verify that all photos and media are saved to a cloud storage application or to your phone's micro-sd card.

Choose your answer from:
a). Samsung galaxy s4 cannot root a samsung galaxy s4 alone. Insert a usb disc into one of your computer's usb drives to allow rooting on your galaxy s4..
b). Navigate to the xda developers website on your computer at http: // forum. Xda-developers.com/showthread..
c). Turn off the power switch on your samsung galaxy s4. There is a first-step to rooting your galaxy s4..
d). Verify that your data is backed up properly in your galaxy s4. Make sure your data is not saved and saved to a cloud storage application..
The answer is:
b).