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The population of Megacity, a sprawling metropolis in

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The population of Megacity, a sprawling metropolis in [#permalink] New post 08 May 2008, 01:05
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A
B
C
D
E

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9.
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages. This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously. Yet the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?

(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
(C) Cities smaller than Megacity have also experienced sustained population growth.
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.
(E) Megacity has long offered better employment prospects than most rural areas.
[Reveal] Spoiler: OA

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Last edited by Zarrolou on 04 Aug 2013, 04:20, edited 1 time in total.
Added OA.
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Re: CR. paradox [#permalink] New post 08 May 2008, 01:56
A?
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Re: CR. paradox [#permalink] New post 08 May 2008, 02:24
Its B. The reason is that none of the other choices are strong enough to justify the stable growth rate despite increasing influx of immigrants. A is not strong enough, as the percentage is not mentioned.
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Re: CR. paradox [#permalink] New post 08 May 2008, 02:39
B for me.

The steady declining birth rate and increasing immigrant rate seem to be keeping a balance thus there is no significant growth in the city population.
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Re: CR. paradox [#permalink] New post 08 May 2008, 03:00
B is fine.
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Re: CR. paradox [#permalink] New post 08 May 2008, 03:00
B has a good straight forward reason for decline is population growth rate.
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Re: CR. paradox [#permalink] New post 08 May 2008, 19:15
I choose B.
The declining birth rate counteracts the improvements in the sanitation facilities.
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Re: CR. paradox [#permalink] New post 09 May 2008, 03:50
i will go with B..

thats because C,D,E are not reasons for lack of acceleration in the population..
whereas A is mortality rate-centric..which doesnt convince me for my answer

what is the oa?
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Re: CR. paradox [#permalink] New post 09 May 2008, 19:21
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Re: The population of Megacity, a sprawling metropolis in [#permalink] New post 04 Aug 2013, 01:25
Can someone explain option A. Is it incorrect since we have to resolve the paradox of why the population growth isn't high enough

whereas option A only provides an alternative reason for mortality rates?
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Re: The population of Megacity, a sprawling metropolis in [#permalink] New post 04 Aug 2013, 04:42
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fozzzy wrote:
Can someone explain option A. Is it incorrect since we have to resolve the paradox of why the population growth isn't high enough

whereas option A only provides an alternative reason for mortality rates?


Before we had poor sanitary conditions and high emigration; now we have high sanitary conditions and high immigrations, but still the growth rate is stable.

A is incorrect because it provides us (at best) a weaker cause of death that replaced the poor sanitary conditions.

So now according to A we have
A weaker cause of death than before and still high immigration. So the population should increase?
The paradox is not solved.
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Re: The population of Megacity, a sprawling metropolis in [#permalink] New post 04 Aug 2013, 10:29
Why not D. The option says that most immigrants settle in Remsland but only initially. Who's to say that they don't move on to some other place. This can be a major cause of population not increasing since most immigrants who settle actually don't stay but move on.
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Re: The population of Megacity, a sprawling metropolis in [#permalink] New post 04 Aug 2013, 11:20
fozzzy wrote:
Can someone explain option A. Is it incorrect since we have to resolve the paradox of why the population growth isn't high enough

whereas option A only provides an alternative reason for mortality rates?


bad sanitation death + immigration ==>initiAL POPULATION

less sanitation death + more immigration + death by accidents.===>TODAYS POPULATION(AS PER OPTION A)

BAD SANITATION DEATH > DEATH BY ACCIDENTS.

still paradox not solved as still we are not sure that death by accidents + less sanitation death is more than or less than BAD SANITATION DEATH.

hope it helps
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Re: The population of Megacity, a sprawling metropolis in   [#permalink] 04 Aug 2013, 11:20
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