Answer :
We can see here that the sentence that contains a fallacy is: Unless everyone in the U.S. including our grandparents can successfully use social media, we will be left behind.
What is fallacy?
Fallacy actually refers to the way that faulty reasoning is used to make an argument and it carried out in such a way that the such faulty reasoning appears stronger.
We can actually see that the fallacy in the sentence is seen above.
Learn more about fallacy on https://brainly.com/question/20939336
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