What i'm starting to notice is usually the choice that has specific, exact words from the passage is the wrong one. If you look closely, it's a trick because you get fooled into thinking that its the right answer based on the fact that it uses the same words; the words are used incorrectly though. Try that see if it helps.
The point of CARS is to test your reasoning and logic skills, so they're gonna want you to be able to use reasoning to get the best answer. Compare the last two of the 50/50 and use the one that sounds more like you had to reason with the authors opinion to get that answer, and the one with the exact words is gonna fool you. HOWEVER, be careful to never select answers that use outside, common thoughts and ideas. These one's are the worse.