I had no idea how to answer this question. I ended up choosing B because in the introduction there wasn't evidence provided that LHB evidence was on Earth. The correct answer is D. I don't understand that at all. Scientist's motivation for studying LHB isn't mentioned anywhere in the article, so how...

I did not understand how to do the formal logic diagram on this. I had it down to A or D, but ended up picking the wrong answer (D) because it mirrored the original more in wording (both use "but since").

Can anyone explain how A is similar to the original stimulus?

I did not think any of the answer choices really weakened the argument so I picked C because I thought it was the only possible non-strengthening answer. The correct answer is D: Identical twins who grow up together tend to develop different beliefs, tastes, and careers in order to differentiate the...

I'm equally confused about #8 but I can try to explain 12 (but forgive me if it doesn't make sense, I'm not a teacher or anything) E. "Passage A provides a historical account of the origins of a phenomenon that is the primary concern of passage B." The problem is that the phenomenon is NOT...

E is wrong because it says "the latter's aesthetic effects did not depend on contrasts of light and shadow"

But this is the opposite. Brancusi's sculptures were based on negative light (shadows) so light and shadow were extremely important for Brancusi.