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A is a trick which fully destroys the argument. Another trick is D which says that new formula "may be flammable". The E is the best because gives strong relation to new formula which is "flammable"
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Temurkhon
A is a trick which fully destroys the argument. Another trick is D which says that new formula "may be flammable". The E is the best because gives strong relation to new formula which is "flammable"


I don't think that the trick in D is because of "may be flammable". Otherwise, answer E would point to the same flaw. I think that the trick in D lays in the word "Aerosol propellants", which is a generalization. E goes straight to the point of "Re-Fresh Air Fresheners".
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One can easily eliminate B, c and D
when it comes to weaken the conclusion, then one has to add some information that directly hurts the conclusion of the argument. The conclusion is "Re-Fresh Air Fresheners’ aerosol sprays are now less toxic to consumers than ever before"
A says that aerosol spray has always contained ammonia but the conclusion says about the new aerosol formula. On the other hand, E says "now contains trace amounts of petroleum distillates" and is flammable. this directly hurts the conclusion and thus is the right choice.
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i cannot understand why D is not correct
A says something about cl reaction which may or may not be present in the house
E talks about flammable (not worth considering we talk about toxicity only )and the toxicity mentioned is only for sensitive personnel
where as D talks that main component is toxic aerosol propellant

please explain ?
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After a recent lawsuit, Re-Fresh Air Fresheners’ most popular aerosol spray was found to contain dangerous levels of p-dichlorobenzene, a toxic substance which irritates the lungs and mucous membranes and may cause cancer. The company decided to retool its aerosol spray formula and successfully removed all p- dichlorobenzene from its line of household sprays. Re-Fresh Air Fresheners’ aerosol sprays are now less toxic to consumers than ever before.

Which of the following, if true, most weakens the author’s conclusion?

A. The company’s most popular aerosol spray has always contained ammonia, which reacts with chlorinated products to produce deadly chloramine gas.

B. Some people who drink water containing p-dichlorobenzene for many years have become anemic.

C. P-dichlorobenzene has been used widely in Europe for many years as a room deodorizer with no complaints or significant lawsuits.

D. Aerosol propellants still used in some of the retooled formulas may be flammable and may cause nervous system damage if inhaled.

E. Re-Fresh Air Fresheners’ new formula for its most popular aerosol spray now contains trace amounts of petroleum distillates, which are flammable, and may cause fatal pulmonary edema in sensitive individuals.

VERITAS PREP OFFICIAL EXPLANATION:



The correct response is (E). The conclusion relies on the phrase “less toxic” to claim the NEW aerosol sprays and safer than the OLD sprays produced by Re-Fresh. This conclusion will be weakened by any information which proves that the NEW sprays are in fact just as toxic, or more toxic. The phrase “now contains” in (E) indicated that the harmful petroleum distillates were no present in the old formula, so it’s possible that the new formula is in fact more toxic. (A) might be tempting, but if both the new and old formulas contain this same ingredient, it does not do enough to prove the new formulas is in fact more toxic, which is a stronger refutation of the conclusion.
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