I was stuck between D and E.
Didn't go for E as the option was bringing in new Information ie 3 new plants

I thought we could bring in new info only for weaken/strengthen questions. Please correct me if I'm wrong.

Many thanks

This question is essentially acting as a weaken question because it asks you to complete the part that describes why the result is "unlikely". We need to introduce new information to show why it is unlikely.

KW

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I have a question regarding the wording used in the questions above. For option E to be the valid answer, shouldn't the phase "before the regulations go into effect" not be included in the question as if E is the OA then even after the regulations are put into effect there will not be a decrease in the rates of respiratory ailments.

Why can't the rates of respiratory ailments go down after the regulations are put into effect? Sure, there will be more plants, but if they are all subject to "strict regulations on emissions", then the combined emissions of the three plants could be less than current emissions of Woodco.

Regardless, we need to explain why "it is unlikely that the rate of respiratory ailments will decline before the regulations go into effect." We don't care about what happens after the regulations are put into effect. Woodco is cutting its emissions in half, but there will soon be three new plants. BEFORE the regulations go into effect, those new plants can emit as much pollution as they want. So, even though Woodco is going to reduce its emissions, it is unlikely that the total amount of airborne pollution will decrease until the regulations go into effect.

I hope that helps!
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As per my understanding new info is not allowed in such question. Can you please clearify ?

As a test-taker, it's generally a terrible idea for you to bring in your own outside knowledge when you're answering GMAT CR questions. But depending on how the question is constructed, the correct answer might be something that did not actually appear in the passage.

For example, think about an assumption question. The correct answer will always be an assumption that the author made in the passage -- so by definition, the correct answer is NOT something that was stated in the passage.

The same is true of this passage, and I think that's what Kyle was saying in his explanation. Check out that last line of the passage again:

"...it is unlikely that the rate of respiratory ailments will decline before the regulations go into effect, since _____________ ."

The correct answer will strengthen the idea that "it is unlikely that respiratory ailments will decline before regulations go into effect." And of course, that "strengthener" will be an additional piece of information that was not already mentioned in the passage.

I hope that helps!
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I have one question


It is regarding option E:It is not necessary that three new plants will emit the same harmful pollution
if we consider this point then option D is better.
Please help

thanks in advance

From the passage, we know that Woodco plans to reduce its respiratory-ailment-inducing pollution in two years, but for some reason the rate of respiratory ailments will not decline for four years. The correct answer will explain why the rate of respiratory ailments won't decline sooner. With that in mind, take another look at (D):


(D) does not explain why the rate of ailments will not decrease as Woodco decreases pollution. The respiratory ailments caused by factors other than pollution will occur regardless of Woodco's efforts, and we have no information that implies that the rate these other ailments will change in the next several years. So, the overall number of ailments would look something like this:

Before Woodco reduces pollution:

• Some number of ailments NOT caused by pollution +
• Some number of ailments caused by pollution

After Woodco reduces pollution in two years:

• The SAME number of ailments NOT caused by pollution +
• A REDUCED number of ailments caused by pollution

As you can see, even given the information in (D) we would expect the overall rate of respiratory ailments to decrease in two years. Because (D) does not explain why this reduction in respiratory ailments will not occur, we can eliminate (D).

(E), on the other hand, provides a perfectly reasonable explanation as to why the rate of ailments will not go down as Woodco reduces pollution -- three more plywood plants are about to go into production. It is true that we do not know whether these plants produce the same pollutants, but the strong possibility that they do provides the "most logical" completion to the passage.

I hope that helps!
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KarishmaB GMATNinja

it is unlikely that the rate of respiratory ailments will decline before the regulations go into effect, since _________

(D) not all respiratory ailments are caused by airborne pollutants

If D is true, there are other reasons exist for respiratory ailments, so other factor would lead to increase in ailments. This could be the reason that rate of ailments unlikely to decrease.
Why D is incorrect?

The conclusion states that it is unlikely that the rate of respiratory ailments will decline. It doesn't say that the ailments are unlikely to be eliminated.

The question then asks us to complete the passage. In other words, why is it unlikely that the rate of respiratory ailments will decline? With that in mind, here's (D):


It's important to pay close attention to the precise wording of the answer choice here. (D) states that "not ALL respiratory ailments are caused by airborne pollutants." In other words, SOME (maybe 1%, maybe 99%) respiratory ailments are caused by things other than airborne pollutants.

The problem is that we still have reason to believe that OTHER (maybe 1%, maybe 99%) respiratory ailments ARE caused by airborne pollutants. So, Woodco's plans to cut emissions will chip away at the cause of some cases of respiratory ailments (not ALL, but some). But even chipping away at SOME of the cases of respiratory ailments will still decrease the overall rate. So, we don't have reason to believe that a decrease in the rate is unlikely, and we can eliminate (D).

I hope that helps!
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