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Bunuel
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The answer should be option D as it explains a reason why people in a factory in Bouvierville contracted serious lung ailments. They are using a different method which can be a possible cause of lung ailments.
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The correct answer is D.
We need to search which options is more likely to weaken the manufacturer claim which is " Their product does not cause illness as other factories which have used their dye do not fall sick"
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A) "At the time Alidin was reformulated, a number of other reformulated and new dyeing products became available."
- This option discusses the availability of other dyeing products but does not directly address the cause of the workers' lung ailments in the Bouvierville factory. It does not provide an alternative explanation for the illnesses.

B) "The manufacturer refused for many years to reformulate Alidin, despite numerous complaints about the damage it was causing to the environment."
- This option provides information about the manufacturer's actions but does not directly weaken the argument by addressing the cause of the workers' lung ailments in the Bouvierville factory. It focuses more on the environmental aspect.

C) "In the Bouvierville factory, many workers who do not use Alidin in their own work nevertheless contracted lung ailments."
- This option introduces an important fact: workers who do not use Alidin still suffered from lung ailments in the Bouvierville factory. This suggests that Alidin may not be the sole cause, potentially weakening the manufacturer's argument. However, it does not directly address the application method of Alidin.

D) "While most dyeing factories apply Alidin by brush, the Bouvierville factory has always sprayed the dye onto fabric."
- This option highlights a crucial difference in the method of applying Alidin between the Bouvierville factory and most other dyeing factories. The Bouvierville factory uses a different method (spraying), which can be relevant to the workers' lung ailments. This difference in application method suggests that the reformulated Alidin may indeed be a possible cause of the ailments, as the application method can impact exposure to the chemicals.

E) "None of the solvents eliminated from Alidin was ever suspected of causing respiratory problems."
- This option discusses the solvents eliminated from Alidin during reformulation but does not directly address the cause of the workers' lung ailments in the Bouvierville factory. It focuses more on the properties of the solvents.

Option (D) is the most appropriate answer because it provides a specific difference in the method of applying Alidin in the Bouvierville factory compared to most other factories. This difference in application method can be a crucial factor in explaining why workers in the Bouvierville factory suffered from lung ailments when workers in other factories did not. It directly weakens the manufacturer's argument by introducing a plausible alternative explanation.
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The fabric dye Alidin was recently reformulated to eliminate certain solvents known to cause damage to the ozone layer. When a factory in Bouvierville started to use the reformulated version of Alidin, several workers contracted serious lung ailments. The manufacturer of Alidin denied that the reformulated product could be the cause of the ailments since numerous other factories had also started to use it, and none of their workers had suffered any ill effects.

Which of the following, if true, most seriously weakens the dye manufacturer's argument?

A. At the time Alidin was reformulated, a number of other reformulated and new dyeing products became available.

B. The manufacturer refused for many years to reformulate Alidin, despite numerous complaints about the damage it was causing to the environment.

C. In the Bouvierville factory, many workers who do not use Alidin in their own work nevertheless contracted lung ailments.

D. While most dyeing factories apply Alidin by brush, the Bouvierville factory has always sprayed the dye onto fabric.

E. None of the solvents eliminated from Alidin was ever suspected of causing respiratory problems.


The passage talks about how a certain company switched the dye it was using during the production process. After it did this, however, some workers began to have lung problems. The company denied it had anything to do with the new dye since other companies who were already using it and their workers faced no issues.

What would harm the reasoning the company gave?

(D) is a good choice. Even if the new dye is the same, HOW you use the dye may not be. Perhaps when you BURN the new dye onto a fabric it is safe but not when you SPRAY it on.

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Bunuel
The fabric dye Alidin was recently reformulated to eliminate certain solvents known to cause damage to the ozone layer. When a factory in Bouvierville started to use the reformulated version of Alidin, several workers contracted serious lung ailments. The manufacturer of Alidin denied that the reformulated product could be the cause of the ailments since numerous other factories had also started to use it, and none of their workers had suffered any ill effects.

Which of the following, if true, most seriously weakens the dye manufacturer's argument?

A. At the time Alidin was reformulated, a number of other reformulated and new dyeing products became available.

B. The manufacturer refused for many years to reformulate Alidin, despite numerous complaints about the damage it was causing to the environment.

C. In the Bouvierville factory, many workers who do not use Alidin in their own work nevertheless contracted lung ailments.

D. While most dyeing factories apply Alidin by brush, the Bouvierville factory has always sprayed the dye onto fabric.

E. None of the solvents eliminated from Alidin was ever suspected of causing respiratory problems.


To explain the discrepancy in a way that weakens that conclusion, it is needed to find a variable that can prevent workers of other factories from contracting the ailments. D introduces the variable and explains the discrepancy. Therefore, the passage does not consider this variable, and its conclusion is weakened when this variable is present.
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IMO E could not be the answer because if "None of the solvents were eliminated from Alidin" then it could have affected the other factories too not just Bouvierville
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