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In 1998, more citizens from the country of Monrovia migrated from Monr

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In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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New post Updated on: 18 Dec 2018, 03:55
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A
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E

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In 1998, more citizens from the country of Monrovia migrated from Monrovia to neighboring Abstania than during any prior year. In 1998, the number of reported violent crimes in Abstania increased dramatically over 1997. The unavoidable conclusion is that Monrovians who migrated from Monrovia to Abstania were responsible for this increase.

Which of the following statements, if true, would most seriously weaken the claim that Monrovians were responsible for the increase in violent crime in Abstania during 1998?


(A) Each year more violent criminals are apprehended in Abstania than in Monrovia.

(B) During 1998 more violent crimes were reported in Abstania than in Monrovia.

(C) In 1998 no Monrovians migrated from either Monrovia or Abstania to any country other than Monrovia or Abstania.

(D) In 1998 the number of unreported violent crimes in Abstania increased as well.

(E) In 1998 fewer Monrovians migrated from Monrovia to Abstania than from Abstania to Monrovia.


Spoiler: :: Official Explanation
Explanation:The correct response is (E). The argument relies on the unstated assumption that Abstania's Monrovian population either remained stable or increased during 1998. However, (E) provides that this population actually declined in 1998, despite the influx of Monrovians. Given that the number of Monrovians residing in Abstania decreased while the crime rate increased, (E) reduces the likelihood that it was Monrovians who were responsible for the increase in violent crime in 1998.

Originally posted by kidchaos on 09 Sep 2010, 00:38.
Last edited by Bunuel on 18 Dec 2018, 03:55, edited 1 time in total.
Renamed the topic and edited the question.
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Re: In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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New post 21 Apr 2011, 09:28
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Isn't this a causal reasoning?
More Monrovians migrated to Abstania -----> increase in crimes in Abstania
E says that:
Quote:
In 1998 fewer Monrovians migrated from Monrovia to Abstania than from Abstania to Monrovia

E weakens the conclusion by showing that although the effect occurs, the cause does not occurs: though few Monrovians migrated from Monrovia to Abstania, the number of crimes in Abstania is still high.
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Re: In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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New post 15 Mar 2014, 16:28
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(A) Each year more violent criminals are apprehended in Abstania than in Monrovia. Strengthen.
(B) During 1998 more violent crimes were reported in Abstania than in Monrovia. Strengthen.
C) In 1998 no Monrovians migrated from either Monrovia or Abstania to any country other than Monrovia or Abstania. Neutral.
(D) In 1998 the number of unreported violent crimes in Abstania increased as well. Strengthen.
(E) In 1998 fewer Monrovians migrated from Monrovia to Abstania than [Monrovians migrated] from Abstania to Monrovia.

If you were to drop in "Monrovians migrated" to make the comparison clearer (because you can do so), then option E jumps out. The net number of Monrovians in Abstania is down, so it is less probable that Monrovians themselves were responsible for the increase in crime.
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Re: In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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New post 22 Dec 2015, 00:46
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(A) Each year more violent criminals are apprehended in Abstania than in Monrovia.

Tempting, but irrelevant to conclusion of "Monrovian migrants are the cause of increase in reported violent crimes." In addition, the argument covers the past year, so this is out of scope.

(B) During 1998 more violent crimes were reported in Abstania than in Monrovia.

Irrelevant to conclusion of "Monrovian migrants are the cause of increase in reported violent crimes."

(C) In 1998 no Monrovians migrated from either Monrovia or Abstania to any country other than Monrovia or Abstania.

Irrelevant to conclusion of "Monrovian migrants are the cause of increase in reported violent crimes."

(D) In 1998 the number of unreported violent crimes in Abstania increased as well.

Irrelevant to conclusion of "Monrovian migrants are the cause of increase in reported violent crimes."

(E) In 1998 fewer Monrovians migrated from Monrovia to Abstania than from Abstania to Monrovia.

Bingo. If the number of Monrovians who left Abstania during 1998 was greater than the number of Monrovians who migrated to Abstania during 1998, then the conclusion of Monrovians being the cause of the increase in reported violent crimes is false.
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Re: In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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New post 13 Sep 2016, 23:20
I can't understand how E is correct even if in 1998 migrants from A to M were more than M to A it can not be concluded that the number of migrants from M to A didn't cause the increase in crime rates.
It just concludes that M population in A decreased
There is no info to conclude that those migrants from M to A were not responsible for violent crimes.
How can this info weaken the argument
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Re: In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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New post 14 Nov 2016, 16:34
taranhundal wrote:
I can't understand how E is correct even if in 1998 migrants from A to M were more than M to A it can not be concluded that the number of migrants from M to A didn't cause the increase in crime rates.
It just concludes that M population in A decreased
There is no info to conclude that those migrants from M to A were not responsible for violent crimes.
How can this info weaken the argument


Of course you can not conclude that Monrovian migrants from M to A caused the increase in violent crimes, but this is a weaken question; you do not have to show that the argument is wrong, you just need to undermine the conclusion.

According to E, in 1998 there were fewer Monrovians. Even though the number of Monrovian migrants from M to A may have caused the increase in violent crimes, choice E certainly undermines the claim by pointing out that there were fewer Monrovians in Abstania.
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Re: In 1998, more citizens from the country of Monrovia migrated from Monr  [#permalink]

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Re: In 1998, more citizens from the country of Monrovia migrated from Monr   [#permalink] 18 Dec 2018, 03:55
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