Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.
Which of the following, if true, weakens the argument above?
A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.
B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.
C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.
D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.
E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.
OA A
Source: e-GMAT
Studies have shown that regularly used household washing mac
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We need to find what weakens the argument.
Premise: Bacteria from regularly used washing machine find their ways to your clothes and then unto us which causes various bacterial infections.
OPTION A - CORRECT
This weakens the argument because it doesn't solve the problem of bacterial infections in human through clothes due to the other kinds of pathogens found in the washing machine.
OPTION B - INCORRECT
This doesn't weaken the argument because the use of undiluted bleach is the approved way of killing bacteria in the washing machine.
OPTION C - INCORRECT
If true, it improves the state of the bleach suitable for the metal drum in the washing machine.
OPTION D - INCORRECT
We are not concerned about the lifespan of the bacteria in question.
OPTION E - INCORRECT
If true, it provides an alternate way to get rid of the bacteria in the washing machine.
Premise: Bacteria from regularly used washing machine find their ways to your clothes and then unto us which causes various bacterial infections.
OPTION A - CORRECT
This weakens the argument because it doesn't solve the problem of bacterial infections in human through clothes due to the other kinds of pathogens found in the washing machine.
OPTION B - INCORRECT
This doesn't weaken the argument because the use of undiluted bleach is the approved way of killing bacteria in the washing machine.
OPTION C - INCORRECT
If true, it improves the state of the bleach suitable for the metal drum in the washing machine.
OPTION D - INCORRECT
We are not concerned about the lifespan of the bacteria in question.
OPTION E - INCORRECT
If true, it provides an alternate way to get rid of the bacteria in the washing machine.