6/7

Question 3 got me, because my thought process was: (1)Premise: Linguists have conducted many comparative analyses of [traditional languages from various regions and eras].

I was not taking "Linguists have conducted many analyses" as the supportive claim. However, (when I first read it), the existence of "traditional languages" leads to there were several languages rooted in different (ancient) cultures. Plus, "from various...eras" leads to the [across different civilizations over time]."

Hence I thought the second sentence is a support for the first sentence on my first take.