Snowmaking machines work by spraying a mist that
freezes immediately on contact with cold air. Because
the sudden freezing kills bacteria, QuickFreeze is
planning to market a wastewater purification system
that works on the same principle. The process works
only when temperatures are cold, however, so
municipalities using it will still need to maintain a
conventional system.

Which of the following, if true, provides the strongest
grounds for a prediction that municipalities will buy
QuickFreeze's purification system despite the need to
maintain a conventional purification system as well?

(A) Bacteria are not the only impurities that must be
removed from wastewater.

(B) Many municipalities have old wastewater
purification systems that need to be replaced.

(C) Conventional wastewater purification systems
have not been fully successful in killing bacteria
at cold temperatures.

(D) During times of warm weather, when it is not in
use, QuickFreeze's purification system requires
relatively little maintenance.

(E) Places where the winters are cold rarely have a
problem of water shortage.

I am not an expert but may be my 2 cents may help you get the point of the argument.

What are we looking for ? We are looking for a reason to buy QUICK freezer at first place when they have conventional system.

B :- It tells us that we have old QUICK FREEZER that needs to be repllaced but it does not tell us that why the municipality will but it when they have conventional system

C;- It correctly tells the reason why we need a Quick freezer in winter season.

HTH

C is the best choice. It gives a clear reason for municipalities to buy this system despite having the conv one.

Hi,

Let's first understand what QuickFreeze (QF) water-purification system is going to do:
QF is going to kill bacteria at cold temperatures only.
Since this will work only at cold temperatures, municipalities will need to keep conventional water purification systems also.

Now, it is given that municipalities will have conventional water-purification systems, whether they buy QF or not. What would make the municipalities buy QF?

They will buy it only if QF offers something, which conventional systems don't offer.

Now, as we go through the options, we see only option C provides an advantage that QF has over conventional systems. Thus, this is the correct choice.

However, let's also consider option A and B, since some of us have chosen these as the answer choices:

(A) Bacteria are not the only impurities that must be removed from wastewater. - But do conventional systems remove bacteria from wastewater? If they do, why would municipalities buy QF systems?

(B) Many municipalities have old wastewater purification systems that need to be replaced. - Clearly, QF systems can't replace old conventional systems, as is clearly stated. This option statement also doesn't provide any reason for municipalities to buy QF, along with conventional systems.

Hope this helps

Feel free to ask in case of any queries.

Meanwhile, dont forget to attend the SC session on Saturday. Please find the link below:


Regards,
Chiranjeev
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Thank you e gmat. I am e gmat customer.
the process you do before going to answer choices is prethinking. I think that the success on cr is based on this prethinking. we need to do something before going to answer choices. we need to be armed with something before looking at the answer choices which are traps.
your prethinking is great.

however, the following question from gmatprep is hard for us to prethink an assumption. pls help us prethink . thank you.
press-secretary-our-critics-claim-that-the-president-s-16458.html

Press secretary: Our critics claim that the President's recent highway project cancellations demonstrate a vindictive desire to punish legislative districts controlled by opposition parties. They offer as evidence the fact that 90% of the projects cancelled were in such districts. But all of the cancelled projects had been identified as wasteful in a report written by respected nonpartisan auditors. So the President's choice was clearly motivated by sound budgetary policy, not partisan politics.
Which of the following is an assumption on which the press secretary's argument depends?
A. Canceling highway projects was not the only way for the President to punish legislative districts controlled by opposition parties.
B. The scheduled highway projects identified as wasteful in the report were not mostly projects in districts controlled by the President's party.
C. The number of projects cancelled was a significant proportion of all the highway projects that were to be undertaken by the government in the near future.
D. Nonpartisan auditors were President's friends.
E. Reports by nonpartisan auditors are not generally regarded by the opposition parties as a source of objective assessment of government projects.