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# Laws requiring the use of headlights during daylight hours

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Senior Manager
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07 Aug 2005, 06:01
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Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 43
Page: 133
Difficulty:

Laws requiring the use of headlights during daylight hours can prevent automobile collisions. However, since daylight visibility is worse in countries farther from the equator, any such laws would obviously be more effective in preventing collisions in those countries. In fact, the only countries that actually have such laws are farther from the equator than is the continental United States.

Which of the following conclusions could be most properly drawn from the information given above?

(A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights.

(B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions.

(C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws.

(D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States.

(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws.

Thanks,
Darth
[Reveal] Spoiler: OA

Last edited by Narenn on 07 Oct 2013, 10:44, edited 4 times in total.
Necessary Corrections for Official Guide Verbal Review 2nd Edition Project
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Re: CR - automobile collisions [#permalink]

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03 Oct 2006, 20:33
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Laws requiring the use of headlights during daylight hours can prevent automobile collisions. However, since daylight visibility is worse in countries farther from the equator, any such laws would obviously be more effective in preventing collisions in those countries. In fact, the only countries that actually have such laws are farther from the equator than is the continental United States.

Which of the following conclusions could be most properly drawn from the information given above?

(A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights.
---> it doesn't sum up all the premises ---> can't be a conclusion.

(B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions.
---> no point in the passage indicates this ---> out.

(C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws.
-----> US is better than farther countries in term of being closer to the equator; however, US is worse than farther countries in term of not having such laws -----> positive side + negative side ----> the result is not necessarily negative ----> C is not applausible ---> out.

(D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States.
----> Same to C

(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws.

-----> Yeah, the reason why US doesn't have such laws is probably because such laws do less to prevent automobile collisions in US than they do in farther countries. ----> applausible. Note that the use of "would probably" makes E least vulnerable to criticism!

Go for E.
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07 Aug 2005, 17:04
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(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws.

- this is good. The argument clearly says that USA, the daytime visibility is good and laws will not help that much, but countries that have such laws already in place are away from the equator, so they have more chance of getting involved in an accident without the law.
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23 Mar 2012, 13:27
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The Argument: the farther away from the equator, the more important it is to use daytime headlights while driving. Indeed, countries north of the U.S. mandate the use of headlights during the day. The U.S. should also require the use of daytime headlights, though such a move would not have as much an impact on lowering collisions the way it does in more northern climes.

Based on the information above, the question is asking what we can most reasonably conclude.

(A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights.

The argument says that the use of daylight headlights lowers the collision rate the more north of the equator you go. Therefore, daylight headlight use in the continental U.S. would help reduce the collision rate.

(B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions.

From the prompt, we do not know anything about which other factors account for collisions in countries north of the U.S. So we can't say that poor visibility is the most important factor.

(C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws.

This one is tempting because you can make the connection that countries up north have to use daytime headlights, so they are less likely to get into accidents during the daytime. But we do not know what the original proportion of either the U.S or northern countries are. So while daytime headlight reduces collision rate, without knowing the original proportion, we cannot say that the U.S. has more daytime collisions.

(D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States.

We only know that daytime headlight laws reduce the collision rate, an effect more pronounced the more north one goes. However, we do not know the total number of accidents up north. Maybe a hundred thousand accidents occur in northern countries. Maybe only ten thousand.

(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws.

Those countries that have the laws are the ones that are more north of the United States, and thus the ones farther from the equator. The farther from the equator, the more important the use of daytime headlights. So the use of daytime headlights in the U.S. would be helpful, but probably not so much as in countries north of the U.S. ANSWER
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07 Aug 2005, 12:35
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Choose E.

this law works better in the countries where visibility is poor. countries that are farther from equator have poor visibility thant continental USA.
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07 Aug 2005, 06:23
C.

Headlight laws can prevent automobile conclusions. It is more effective in countries that have poor day light. So, of the total automobile collisions that happen in those coutries, the daytime collisions are lesser than in the US.

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07 Aug 2005, 14:19
Would go with A...

Since continental US is close to the equator, the law requiring drivers to turn on the headlights wouldnt make any difference 'cos of the availability of sunlight(since it is close to equator)
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07 Aug 2005, 15:29
E can be more properly drawn from the statements than A, according to me.
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03 Oct 2006, 18:30
Time yourself 2 mins

Laws requiring the use of headlights during daylight hours can prevent automobile collisions. However, since daylight visibility is worse in countries farther from the equator, any such laws would obviously be more effective in preventing collisions in those countries. In fact, the only countries that actually have such laws are farther from the equator than is the continental United States.

Which of the following conclusions could be most properly drawn from the information given above?

(A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights.

(B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions.

(C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws.

(D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States.

(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws.
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04 Oct 2006, 00:54
B is a sweeping conclusion. We need more information to come to that conclusion.

this statement makes it clear. "any such laws would obviously be more effective in preventing collisions in those countries"

more effective because, there is more chance of collisions
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06 Oct 2006, 08:27
Raising the minimum driving age to 18, or even 21, would probably be the most effective way to reduce the number of annual auto accidents in the continental US. This one is a clear (E). <--- I meant E!

* The disclaimer here is continental. Otherwise we would have to consider Alaska, which is dark 24 hours a day three months out of the year.

Last edited by GMATT73 on 07 Oct 2006, 02:01, edited 1 time in total.
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06 Oct 2006, 10:00
Less than a minute to arrive at E
Countries farther from the equator than continental US have poorer daylight visibility. They have mandatory daytime headlight laws.

Since visibility in US is better than those countries, the benefits of the law will be less significant in the US.
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19 Sep 2011, 01:56
HIMALAYA wrote:
Choose E.

this law works better in the countries where visibility is poor. countries that are farther from equator have poor visibility thant continental USA.

Can you please explain me the line "In fact, the only countries that actually have such laws are farther from the equator than is the continental United States. "

I didt get the last line....
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19 Sep 2011, 02:38
Which of the following conclusions could be most properly drawn from the information given above?

(A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights.-------- Comparing drivers driving in d same country with headlights on & off. The passage discusses about different continents. Not relevnant
(B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions.--- No mention of 'factors' in the passage.
(C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws.--this is definitely a wrong conclusion. Kind of opp. answer
(D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States.--Passage discusses about the effectiveness of daytime headlight laws. This point is not discussed in this option.
(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws. ---Correct
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23 Mar 2012, 12:02
I have chosen E for this question:

A. This answer choice cannot be concluded from the passage. If anything, the first sentence presents an argument against this answer choice.

B. We cannot be sure that poor daylight visibility is the single most important factor in automobile collisions. There could be any number of factors that are more important than daylight visibility - nothing about this is mentioned in the passage, so this answer choice is incorrect.

C. This almost seems like a reverse answer. It sounds like the ratio of collisions in the US has higher than in countries with these laws. This does not make sense because logically you would think it would be the exact opposite. In either case, this answer choice cannot be proven in the passage, so it is incorrect.

D. We cannot conclude what the number of collisions are in either country. Therefore, this answer choice is incorrect.

E. This answer choice is correct. We can conclude that this statement must be true because of the statement in the argument: "Since daylight visibility is worse in countries farther from the equator, any such laws would obviously be more effective in preventing collisions in those countries." Essentially this answer choice is presenting the other side - that countries closer to the equator with headlight laws would be less effective.
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08 Dec 2014, 06:01
Hi,

Can someone explain why is 'A' wrong? Thanks.
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10 Feb 2015, 05:21
aj0809 wrote:
Hi,

Can someone explain why is 'A' wrong? Thanks.

I'd like to explain why not 'A'

The argument stem says

Laws requiring the use of headlights during daylight hours can prevent auto mobile collisions. However, since daylight visibility is worse in countries farther from the equator, any such laws would obviously be more effective in preventing collisions in those countries. In fact, the only countries that actually have such laws are farther from the equator than is the continental United States.

The statement in bold says it'll bemore effective in preventing collisions in countries that are farther from the equator, therefore, we can say that they'll be effective to some extent in countries that are close to equator.

So, that makes the statement A false that "Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights. "

Hope that helps
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25 Feb 2015, 14:19
headlights during daylight hours can prevent automobile collisions
Daylight visibility is worse in countries farther from the equator, --> such laws would obviously be more effective in preventing collisions
In fact, the only countries that actually have such laws are farther from the equator than is the continental United States.

(A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights --> headlights during daylight hours can prevent automobile collisions

(B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions --> there is no statement made in the argument about it. FACT TEST !

(C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws --> we don't have this information in the argument

(D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States --> No #`s stated in the arguemtn to make such comparison.

(E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws --> CORRECT. Such laws would obviously be more effective in preventing collisions in countries with worse daylight visibility can be found in the argument 1:1 !
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15 Sep 2015, 20:32
I chose D over E, because D talks about probability. It might be, or might not be the case.
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Re: Laws requiring the use of headlights during daylight hours   [#permalink] 18 Oct 2016, 13:04

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