How can this sentence be revised to formal style? [Stimulus]
If people are unable to look away from their smart phones and communicate with the world around them, then it will be in the end of civilization, as we know it.
Select one:

A: If people are unable to look away from their smart phones for more than five minutes and communicate with people directly in front of them, then it will be in the end of civilization, as we know it.
B: If people are unable to look away from their smart phones and communicate with the world, then it will be in the end of civilization.

C: If a person is unable to look away from his or her smart phones and communicate with the world around him or her, then it will be in the end of civilization, as society knows it.

D: If people are unable to look away from their smart phones and communicate with the world around them, then the quality of their interpersonal communications may suffer in the future.