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All laundry detergents contain surfactants

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Director
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Joined: 30 Jan 2016
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Location: United States (MA)
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All laundry detergents contain surfactants  [#permalink]

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New post 07 Dec 2017, 09:28
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A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

62% (01:30) correct 38% (01:59) wrong based on 104 sessions

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All laundry detergents contain surfactants, which can harm aquatic life. However, the environmental effects of most ingredients in laundry detergents, including most of those in so-called "ecologically friendly" detergents, are unknown. Therefore, there is no reason to suppose that laundry detergents advertised as ecologically friendly are less damaging to the environment than other laundry detergents are.

Which one of the following, if true, most weakens the argument?

(A) Laundry detergents that are advertised as ecologically friendly contain much lower amounts of surfactants, on average, than do other laundry detergents.
(B) There is no reason to suppose that most of the ingredients in laundry detergents not advertised as ecologically friendly harm the environment significantly.
(C) Different kinds of laundry detergents contain different kinds of surfactants, which differ in the degree to which tlhey could potentially harm aquatic life.
(D) There is reason to suppose that ingredients in laundry detergents other than surfactants harm the environment more than surfactants do.
(E) Laundry detergents advertised as environmentally friendly are typically less effective than other detergents, so that larger amounts must be used.

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Re: All laundry detergents contain surfactants  [#permalink]

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New post 07 Dec 2017, 19:59
The argument here is, that surfactants harm the environment. So if surfactant is less in a detergent then it will cause less harm. We have to find an option that matches this.
A seems to be the right option for that.

A

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Re: All laundry detergents contain surfactants &nbs [#permalink] 07 Dec 2017, 19:59
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