Answer:
A) An ad hominem attack
Step-by-step explanation:
Sentence 2 states that
"No amount of complaining by an older generation who cannot even turn on a computer will change the fact that we live in a social media world."
This is an ad hominem attack because while it may be persuasive, it is rude and attacks the person, or the group of people, instead of giving actual reasoning or evidence.
This is a fallacy because it is weakening their argument by putting aside the debate at hand to personally attack the older generation
Have a lovely day :)