Some classes of animal are

Answer choices

1. A

   Out of Scope: geographically isolated5% picked this

   the Arctic Circle and Tierra del Fuego do not constitute geographically

   The author merely brings up these two examples as rhetorical way of saying "from Pole to Pole", from the far North to the far South of the globe. It doesn't matter whether they're geographically isolated or connected.

   5%
2. B

   Too Strong: most2% picked this

   because ants do not inhabit only a small niche in a geographically isolated area, they are

   We can't say whether the author would say ants are or aren't like 51% or more of insects. Given that insects are identified as a very successful class, it's plausible that most of them inhabit a wide swatch of geographical areas, just like ants.

   2%
3. C

   Too Strong: only9% picked this

   the only way a class of animal can avoid being threatened is to spread into

   The author doesn't need to assume that there's one and only one way to avoid being threatened.

   9%
4. D

   Reversed16% picked this

   what is true of the constituent elements of a whole is also true

   This argument said, because it's true of the whole (ants, as a type of insect), it's true of the constituent elements (each ant). This says the reverse.

   16%
5. E

   Correct68% picked this

   what is true of a whole is also true of its

   Why this is right

   What's true of the whole family of ants is that they are super successful. In concluding that every single ant species is unthreatened, the author is assuming that each any species must be super successful.

   Skill tested: Flaw · how this choice captures the argument's function is the move to repeat next time.

   68%