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

How to reset a blackberry
Open the battery cover on the back of the blackberry.
Remove the battery from the phone.
You can perform a hard reset on the blackberry z10 by pressing and holding the power button on the top of the phone for about 10 seconds.

Possible answers:
(I). Reinsert the battery after a few seconds. To be on the safe side, wait for up to 30 seconds and then reinsert the battery into the back of the phone..
(II). A worksheet will display on-screen with instructions on how to reset the phone to factory settings. Press and hold the power button on the blackberry z10..
(III). Insert the usb battery cartridge back into the phone. The battery tray is in the middle of the phone..
(IV). Remove the battery from the back of the phone. You can remove the battery in any position you can without damaging the bluetooth features..
The answer is:
(I).