I am still not understanding the correct answer choice.

Hi @kaylarussell, Thanks for the question! So let’s take a look at what the argument is telling us, and this is definitely one we’ll need to diagram for, based on the “unless” and “only” words in the stimulus. We’re told that the only way bookstores can profitably sell books at below-market prices is to get the books at a discount from publishers; in other words, bookstores can profitably sell at below-market prices only if they get the books at a discount from these publishers. Remember we diagram “X only if Y” as X —> Y, so we diagram this SBBMP —> GBDP Next sentence: unless bookstores generate a high sales volume, they can’t get discounts from publishers. Remember we diagram X unless Y as ~Y—>X (or, equivalently, its contrapositive, ~X—>Y). So we get: ~GHSV —> ~GBDP Finally, we’re told that to generate such volume, bookstores must either cater to mass tastes or have exclusive access to a large specialized market, or both. In other words, if they do generate such volume, then they fulfill one or both of those conditions. So we diagram this GHSV —> CMT v EALSM Now we’re told that a bookstore doesn’t cater to mass tastes. What can we conclude from this? Well, let’s take the contrapositive of the last statement: ~(CMT v EALSM) —> ~GHSV And recall that ~(X v Y) is equivalent to ~X & ~Y, so we can rewrite this as ~CMT & ~EALSM —> ~GHSV OK. So we already know ~CMT is true for this bookstore. If we also knew ~EALSM, we could get this logical chain moving. This is what (D) tells us: that the bookstore also ~EALSM. This allows us to conclude ~GHSV, which allows us to conclude ~GBDP. Taking the contrapositive of the first statement, we get ~GBDP —> ~SBBMP And so we can also conclude that for this bookstore, ~SBBMP. It can’t sell any of its books at below-market prices if it also doesn’t have exclusive access to a large specialized market, and so (D) is false. This question, just like all the questions assigned in the LSATMax course, now have detailed forward facing explanations that you can access when you “Review” your session. You will find unrivaled explanations written by our 99th-percentile instructors that include: (1) Argument or Facts, (2) Valid or Flawed, (3) Question Type, (4) Stimulus Summary, (5) Answer Anticipation, (6) Correct & Incorrect Answer Choice Explanations and (7) Key Takeaways. To ensure the optimal prep experience, please make sure you are taking advantage of these existing explanations before seeking further clarification on the message boards.  Hope this helps! Feel free to ask any other questions that you might have.