The specific outrageous acts attributed to Caligula in Roman documentation are very similar to acts attributed in earlier writings to other rulers
Why this is right
Before I defend this answer, I want to acknowledge that I definitely didn't pick this, and when I found out it was correct it basically broke my heart. I believe I said stuff like, "I just don't get you anymore, LSAT." :) The idea behind this answer is that it adds some plausibility to the author's argument, by making it seem like the allegations of cruelty and insanity leveled against Caligula were just recycled fabrications that had been used on previous leaders. It's kind of like if parents who were nervous about TikTok recycled all the bad things people used to say about Facebook, which recycled all the bad things people used to say about video games, which recycled all the bad things people used to say about MTV. The idea is that when the same accusation is continually leveled against different things, it starts to lose credibility. If Megan keeps breaking up with people for the same reason: they "have a toxic energy", then maybe her friends start doubting that accusation and think the problem is really with Megan. What's supposed to make this answer sound "suspicious" is that the specific things attributed to Caligula were very similar to things attributed to other rules alleged to be cruel. If we hear that "Caligula used to rip the fingernails off his political opponents" it sounds scary. But if we find out that earlier writings accused previous rulers of being so cruel that they would "rip the fingernails off their political opponents", then it starts to sound less like an honest description and more like fear-mongering done by opponents. So, again, the intent of this answer is that it tries to make the specific allegations against Caligula sound more phony because it's unlikely that multiple cruel tyrants would engage in specific outrageous acts that were very similar. [face palm]
Skill tested: Strengthen · how this choice captures the argument's function is the move to repeat next time.