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

How to fix a cell phone
Check the batteries.
Batteries are one of the first parts that fail on phones. It's also one of the parts that are very easy to fix.

OPTIONS:
[1]. For instance, your phone might have a low charge. You need to replace the batteries on all 4 chargers.
[2]. When your phone quickly runs out of battery or it feels bloated, it's time to go to the nearest electronic store and purchase a new battery pack. When purchasing a new battery for your phone, remember to pick the one that's specifically for your phone only.
[3]. But they should still work once you've placed the phone somewhere safe. Check the front of the car for burnt-out or bent batteries.
[4]. Without properly shopping around for new batteries, you might find yourself begging for them every time you get a new one. Call your phone's battery manager and tell them to point out the new battery in your phone for you.
The answer is:
[2].