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It is probably within the reach of human technology to make [#permalink]
23 Sep 2005, 09:26
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It is probably within the reach of human technology to make the climate of Mars inhabitable. It might be several centuries before people could live there, even with breathing apparatuses, but some of the worldâ€™s great temples and cathedrals took centuries to build. Research efforts now are justified if there is even a chance of making another planet inhabitable. Besides, the intellectual exercise of understanding how the Martian atmosphere might be changed could help in understanding atmospheric changes inadvertently triggered by human activity on Earth.
The main point of the argument is that
(A) it is probably technologically possible for humankind to alter the climate of Mars
(B) it would take several centuries to make Mars even marginally inhabitable
(C) making Mars inhabitable is an effort comparable to building a great temple or cathedral
(D) research efforts aimed at discovering how to change the climate of Mars are justified
(E) efforts to change the climate of Mars could facilitate understanding of the Earthâ€™s climate
A is out because it is explicity stated in the argument that human technology is within the rach to make martian climate inhabitable
B and C are out for the same reason A is out.
E is farfetched because nowhere in the passage is it stated that efforts are presently made to change the climate of Mars. Efforts are only made to see if Martian atmosphere might be changed.
According to Research efforts now are justified if there is even a chance of making another planet inhabitable, the main point of this passage must be D. The senteces beofre this are leading you to the main point/statement of the author. After this sentences, the author adds additional information, but nothing relevant for the pourpose is stated.
1. Argument starts with that making Mars inhabitable is probably within the reach of human technology.
2. Comparision between time it will take to make Mars living place and centuries it took to build cathederals
3. Finally research efforts (about point 1) are justified for two reasons:
a)justified if there is even a chance of making another planet inhabitable.
b)Besides, the intellectual exercise of understanding how the Martian atmosphere might be changed could help in understanding atmospheric changes inadvertently triggered by human activity on Earth
Choice A does not talk about the justification part that is the main argument as first statement is acting as an evidence only.
Choice B, after seeing the above analysis can be easily eliminated.
Choice C, is making the comparison between time periods.
Choice D, bingo this talks about the core issue described above.
Choice E, talks about only one of the reason mentioned above.