The answer is number 3. Hope it helps! :)
Bandwagon is the logical fallacy in English in which writers use to try to persuade their readers to agree with their opinion using argumentative fallacies. In specific Band wagon is saying," Everyone is doing it so why aren't you?"
For example everyone is trying new grape toothpaste why aren't you?
They are using the logical fallacy to get you to 'get on the wagon' and 'be like everyone else'.
Hope this helps! If you need anymore help or further explanation just let me know!! :)
