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The population of Megacity, a sprawling metropolis in [#permalink]
08 May 2008, 01:05
70% (02:09) correct
29% (01:39) wrong based on 157 sessions
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.
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.
Re: The population of Megacity, a sprawling metropolis in [#permalink]
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.