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A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.

City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights. (Correct because this suggests that rather than taking measures to decrease preventable traffic safety issues the police have misidentified causes to other factors which in turn decreases the number of accidents classified as preventable)
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year. (Incorrect because last statement acknowledges that police can't really influence the accidents caused by other factors)
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year. (Incorrect because it has not been stated how the city residents get to know the number of accidents)
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police. (Irrelevant)
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents. (Incorrect because city residents have to believe that drivers ignoring traffic lights was the cause of the accidents or else the whole argument loses basis, moreover they did believe it earlier, no reason why they won't believe it now)
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Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.


 


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A. Sounded good at first but it didn't say they changed their behavior which means even if they are inaccurate sometimes the consistency in that would make the change in data valid. B. They specifically said percentage so this would make the percentage go down even without changing anything. C. Doesn't make much sense its targeting the inquests argument. D. same here I feel it is a smaller portion. E. Same logic as A. they are being consistent in their inaccuracy. This leaves B as a flaw
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A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
Doesent highlight the logical flaw in reasoning. This looks at the accuracy of data. Our requirement is to see the flaw in percentage drop not misinterpretation of the data, which is considered accurate

B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
Highlights the logical flaw in the reasoning. A fall in the percentage doesn’t mean an improvement if accidents from other causes are rising sharply. The conclusion is invalid if total number of accidents is increasing

C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
Doesent highlight the logical flaw in reasoning. It attacks the reliability of the data source and not the reasoning for the percentage change

D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
Doesent highlight the logical flaw in reasoning. This discusses the number of inquests not the percentage change

E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.
Doesent highlight the logical flaw in reasoning. It looks at public perception rather than the accident causes or percentage changes

Ans: B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
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City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. The percentage is the number of accidents caused by drivers ignoring traffic light over the total number of accidents.

The conclusion: this happened because the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues.

Implied assumption: Although accidents caused by other factors have not been eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing

The percentage is only a proportion and not the absolute value. Although the proportion of accidents caused by preventable traffic safety issues to the total accidents is reducing. It does not imply that the absolute value is decreasing.

Option B supports this logical flaw and weakens the conclusion. because it suggests that the total accidents is increasing

Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
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City resident's reasoning: By decrease in percentage of accidents related to traffic light ignorance he concluded accidents related preventable traffic safety issues are certainly decreasing.

Apparent Flaw here is city resident is assuming accidents related to traffic light ignorance is major proportion of accidents related preventable traffic safety issues. Lets see options

A. This is challenging accuracy of data recorded. Hence, INCORRECT
B. This directly undermines the logic. Hence, CORRECT
C. This is challenging accuracy of data recorded. Hence, INCORRECT
D. Argument is not related to other accidents caused by other factors. Hence, INCORRECT
E. Argument is not related to public perception. Hence, INCORRECT
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Let's analyse the options:

A)This would actually strengthen the idea that traffic-light-related accidents are decreasing, as some might be misclassified. It doesn't highlight a flaw in the resident's reasoning about the overall decrease

B)This is the flaw. The argument states the percentage of accidents due to ignoring traffic lights has fallen. If the total number of accidents (from all causes) has significantly increased, then a smaller percentage of traffic-light-related accidents could still mean the actual number of such accidents, or even all preventable accidents, has stayed the same or even increased

C)This attacks the reliability of the data source, but not the specific logical leap made by the resident between the percentage decrease and the overall decrease. The argument is based on the premise that the percentage did fall.

D)This is about inquests, not the core causal argument about accident numbers or percentages. It doesn't directly address the logical leap in the conclusion.

E)This deals with public perception, not the actual statistics or the resident's flawed interpretation of those statistics

Correct option B
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A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
It sounds a good answer (I even got positive about this one first time), but "sometimes" is not so strong.

B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
Yes, this one is the option that most highlight a possible logic flaw. If other type factors accidents grew a lot, then, even with same number of traffic lights (or even increasing, but in a lower pace than the other accidents) we will see a "percentage" decrease but not a decrease in the number of accidents.


C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
It's a "ok" consideration, but it is not really strong.

D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
It is not related with our task.

E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.
It is not related with our task. What city residents believe or not should not influence the question (maybe if they report to the police, but even in this situation it is not really strong).

Answer = B.
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A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights. Incorrect as this does [color=#404040]not challenge the misinterpretation of percentage versus absolute change [/color]
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year. Correct if this is true then the actual decline in traffic lights related accidents is false
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year. Incorrect because it is irrelevant and does not affect the observation and conclusion made
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police. Incorrect because it does [color=#404040]not undermine the resident's inference from the percentage decrease. [/color]
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents. Irrelevant thus incorrect
ANS B
Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.


 


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Main conclusion: accidents that happen due to preventable traffic safety issues are certainly decreasing

Secondary conclusion: The traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues

Premise: The percentage of accidents caused by drivers ignoring traffic lights has fallen considerably

A. Though the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights, it still may be assigned to a cause falling under preventable traffic safety issues. This does not prove the argument is flawed. Eliminate

B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year. Because of this the percentage of accidents caused by drivers ignoring traffic lights may fallen considerably. This does not mean that the number of accidents that happen due to preventable traffic safety issues are certainly decreasing. This proves the flaw in the argument. Correct

C.
It may not be most reliable. But still it does not relate to any flaw in the reasoning of the argument. Eliminate

D.
The police took measures for the inquests made only regarding preventable traffic safety issues. Inquests due to other factors are irrelevant. Eliminate

E.
City residents' belief is not a data point relevant to this argument. Eliminate

Answer: B
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A. This suggests the data might be a bit inaccurate. But the resident's flaw isn't about bad data. It's about misinterpreting percentages.
B. The resident sees a percentage drop in traffic-light accidents and assumes improvement. But if other accidents grow, traffic-light accidents would automatically become a smaller percentage, even if their actual number stayed the same or grew.
C. The resident's error is logical, misunderstanding percentages, not about data quality.
D. It doesn’t challenge the resident’s mistake equating a percentage drop with police effectiveness.
E. The resident’s flaw is statistical, not about opinions.

Correct answer is B
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City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

May be overall number of accidents caused by other reasons increased which makes this % look smaller as compared to previous year. For e.g. earlier they were 50 out of 100 and now they are 50 out of 200


Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights. This behaviour is not new, it could have been the case previously as well
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year. This is aligned with our prethinking
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year. This is not new i.e. no new behaviour, it could have been the case previously as well
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police. This is irrelevant. We don't care about the inquests
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents. This is irrelevant. We don't care what the city residents believe


Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.


 


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The argument treats a drop in the percentage of light‐signal crashes as proof that those crashes fell due to police action. But if accidents from other causes climb sharply, that percentage can fall even when light‐signal crashes stay the same or rise. Option B shows this mismatch between share and actual count. Option A blames errors in reports rather than address how a percentage change might mask actual numbers. Option C questions data reliability but does not undermine the jump from percentage to cause. Option D says more inquests follow other accidents, which misses the point about relative rates. Option E appeals to what residents believe about causes rather than to the accident figures themselves.

Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.


 


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Pre-thinking: it can be a percertage problem.

A. Focuses on potential misclassification of accidents by police. While this could affect statistics, it's a data quality issue rather than a logical flaw in interpreting percentages.
B. This directly points out that the percentage decrease could simply reflect an increase in other accident types, not necessarily any actual reduction in traffic-light violations or effective police action.
C. This is about data collection methods rather than the percentage interpretation mistake.
D. This introduces an irrelevant chain of causation that doesn't address the core percentage misinterpretation.
E. This is about perception rather than the statistical reasoning error.

Answer B
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A. It provided us with a scenario that what if there is some other possibility of decreasing cases of drivers ignorance, the traffic police reports it incorrectly.
Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.


 


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The argument jumps from the premise that the percentage of accidents caused by drivers ignoring traffic lights has fallen to the conclusion that accidents that happen due to preventable traffic safety issues are certainly decreasing. In other words, the argument is comparing percentages and numbers and the option that attacks this flaw will be our answer.

A - Sometimes incorrectly attributing accidents to a cause other than drivers ignoring traffic lights does not weaken the conclusion.

B - We are not bothered about accidents caused by factors other than drivers ignoring traffic lights

C - It may not be the most reliable way, but is still one of the reliable ways in which number of accidents may be traced.

D - This weakens the conclusion. What if the total number of accidents happened to increase while the number of accidents caused by ignoring traffic lights remained the same. Then the authors conclusion would be weakened.

E - Irrelevant

Therefore, Option D
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[*]A. Eliminated because it attacks the premise's accuracy, not the reasoning from the premise.
[*]B. Correct.
[*]C. Eliminated because it attacks the reliability of data source, not the reasoning from the premise.
[*]D. Eliminated because it discusses inquests related to other factors, irrelevant to the core flaw.
[*]E. Eliminated because it discusses public belief, which is external to the argument's logic.



Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.


 


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Classic gmat question type.
Before 100 accidents -> 10 traffic violations =10%
Now 200 accidents-> 10 traffic violations
=5%
Still the number of traffic violations
Bunuel
Bunuel
City resident: This year, the percentage of accidents caused by drivers ignoring traffic lights has fallen considerably. This means that the traffic police listened to our inquests regarding preventable traffic safety issues and took the measures needed to resolve the issues. Although accidents caused by other factors will not be eliminated, accidents that happen due to preventable traffic safety issues are certainly decreasing.

Of the following, which most clearly highlights a logical flaw in the reasoning of the city resident?

A. In reporting accidents caused due to drivers ignoring traffic light, the traffic police sometimes incorrectly attribute the accidents to a cause other than drivers ignoring traffic lights.
B. Accidents caused by factors other than drivers ignoring traffic lights could have risen sharply in number during the relevant year.
C. It is possible that inquests made with the traffic police are not the most reliable way to ascertain how many accidents took place in a particular year.
D. The accidents caused by other factors may have increased the number of inquests made with the traffic police.
E. In some accidents caused due to drivers ignoring traffic light, city residents many not believe that drivers ignoring traffic lights was the cause of the accidents.
Experts' Global Explanation:

Mind-map: Percentage of accidents caused by drivers ignoring traffic lights declined this year à resident inquests regarding preventable traffic safety issues are addressed by traffic police à accidents caused by other factors will remain à accidents that happen due to preventable traffic safety issues are decreasing (conclusion)

Missing-link: Between percentage of accidents caused by drivers ignoring traffic lights declining this year and the conclusion that accidents that happen due to preventable traffic safety issues are decreasing

Expectation from the correct answer choice: Something on the lines of confusing the decline in the “percentage” of accidents of a particular type, among all accidents, with the decline in the “number” of the accidents of that type

Note: This argument commits the classic GMAT error of confusing “percentage" with "absolute numbers”; the city resident cites the decline in the “percentage” of accidents of a particular type, among all accidents, but draws a conclusion about the decline in the “number” of the accidents of that type. Besides, please be extra careful when you see numbers/percentages/proportions in CR questions; often, the key lies in the numbers.

A. Trap. This answer choice, suggesting that some accidents are likely not correctly attributed to drivers ignoring traffic lights, indicates underreporting of such accidents; this answer choice makes no suggestion regarding a specific timeline, suggesting that this answer choice indicates underreporting at all times in the past; so, underreporting is a common factor in the past years and in this year, thus failing to explain any difference in the proportion/number of such accidents in this year; hence, this answer choice is just additional information and does not weaken the argument. Furthermore, the flaw in the argument is that it confuses the decline in the “percentage” of accidents of a particular type, among all accidents, with the decline in the “number” of the accidents of that type; we need an answer choice on similar lines. Because this answer choice does not indicate the flaw in the argument, this answer choice is incorrect.

B. Correct. If there is a sharp rise in the number of accidents because of factors other than drivers ignoring traffic lights, the number of all accidents is likely to rise significantly; a large increase in the total number of accidents indicates that even if the percentage of accidents of a particular type declined, it does not necessarily indicate a decline in the number of such accidents (example: 10% of 100 is greater than 8% of 150); so, the possibility stated in this answer choice casts doubt on the conclusion that accidents that happen due to preventable traffic safety issues are decreasing; hence, failure to consider the sharp rise in the accidents caused by other factors is the flaw in the argument, as the answer choice mentions. Because this answer choice indicates the flaw in the argument, this answer choice is correct.

C. Trap. The argument is concerned with whether the accidents that happen due to preventable traffic safety issues are decreasing; the city resident cites inquests as the cause for this decline and not as a measure of the number of accidents; whether inquests are the most reliable way to ascertain the number of accidents has no bearing on the argument; so, failure to consider the possibility stated in this answer choice is not the flaw in the argument. Furthermore, the flaw in the argument is that it confuses the decline in the “percentage” of accidents of a particular type, among all accidents, with the decline in the “number” of the accidents of that type; we need an answer choice on similar lines. Because this answer choice does not indicate the flaw in the argument, this answer choice is incorrect.

D. Trap. The argument is concerned with whether the accidents that happen due to preventable traffic safety issues are decreasing; the city resident cites inquests as the cause for this decline; whether the number of inquests increased and what the cause for the increase was have no bearing on the argument; so, failure to consider the possibility stated in the answer choice is not the flaw in the argument. Furthermore, the flaw in the argument is that it confuses the decline in the “percentage” of accidents of a particular type, among all accidents, with the decline in the “number” of accidents of that type; we need an answer choice on similar lines. Because this answer choice does not indicate the flaw in the argument, this answer choice is incorrect.

E. Trap. What the city residents believe regarding particular accidents and their causes makes no suggestion regarding whether the accidents that happen due to preventable traffic safety issues are decreasing; so, this answer choice is just additional information and does not weaken the argument; hence, failure to consider the possibility stated in the answer choice is not the flaw in the argument. Furthermore, the flaw in the argument is that it confuses the decline in the “percentage” of accidents of a particular type, among all accidents, with the decline in the “number” of the accidents of that type; we need an answer choice on similar lines. Because this answer choice does not indicate the flaw in the argument, this answer choice is incorrect.

B is the best choice.
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