Though Earth's human population is increasing, it currently uses only a relatively small fraction of the supply of fr...

Jaimee on October 19, 2018

Can you please explain?

Can someone explain by B is the right answer, and not D?

4 Replies

Mehran on October 20, 2018

Hi @Jaimee-Salgado, thanks for your post. As always, let's start with the stimulus. This one presents a set of facts, rather than an argument - there is no conclusion to speak of. The question stem asks you to select the answer that is textually supported by the information in the stimulus (thus, this is a Must Be True question).

Answer choice (E) is textually supported by the first sentence of the stimulus. That sentence tells you that individually-tailored work schedules do "not typically increase managers' job satisfaction or their efficiency." Because of this, (E) must be true: "The typical benefits of flexible-schedule policies *cannot* be reliably inferred from observations of the effects of such policies on managers."

Answer choice (B) is incorrect because the stimulus tells you that the benefits of flexible-schedule policies "dissipate somewhat over time," which means it is not clear that such policies "should be expected to improve the morale of some but not the overall morale." We just don't know enough to comment on "overall morale," especially given the fact that certain benefits of flexible-schedule policies "dissipate somewhat over time."

Hope this helps! Please let us know if you have any additional questions.

Jacob on October 27, 2018

As always, let’s focus on the question stem. We are looking for an answer that weakens the argument if it is accepted as true.

The argument is structured as follows.

Premise: Though earth’s population is increasing, we use a fraction of fresh water.

Conclusion: Claims that water shortages will plague humankind unless population growth changes are mistaken.

B is correct because it adds a variable: the location of fresh water. Therefore, even if the human population overall only uses a fraction of available fresh water, certain locations (and certain populations at those locations) may be using a much larger fraction of the available fresh water. And therefore the claim that water shortages will plague humankind may be true in those locations.

D is incorrect because even if is true that if population increases, all resources will be outstripped, that truth doesn’t weaken the argument that water shortages will plague humankind. If anything, it strengthens it!

I hope that helps. Please let us know if you have further questions.

on October 10 at 09:41PM

If it is true that population growth will outstrip resources(water is a resource), then it would support the claim being argued against. And if true means it's a fact would that not mean the claim is accurate and the argument is wrong?

Shunhe on December 27 at 02:31AM

Hi @chris_va,

The problem with (D) is the time frames involved. (D) talks about the "eventual" outstripping of resources, whereas the stimulus is concerned with the "near future." Hope this helps clear things up.