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20 Jun 2026, 10:14
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Difficulty:
55%
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Question Stats:
57% (01:31) correct
43%
(01:34)
wrong
based on 271
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To establish a human colony on Mars would involve assembling tremendous quantities of basic materials at the site of the colony. But because the costs of transporting such materials through space would be so high, it will not be economically feasible to colonize Mars.
Which one of the following is an assumption required by the argument?
(A) Only if the cost of transporting materials from Earth to Mars decreases will human habitation be established on Mars.
(B) The cost of transporting basic materials through space is not expected to decrease in the near future.
(C) Earth is the only source of the basic materials that would be needed to establish human habitation on Mars.
(D) No significant benefit would result from establishing human habitation on Mars.
(E) Mars is not a practical source of the basic materials required for establishing human habitation there.
Which one of the following is an assumption required by the argument?
(A) Only if the cost of transporting materials from Earth to Mars decreases will human habitation be established on Mars.
(B) The cost of transporting basic materials through space is not expected to decrease in the near future.
(C) Earth is the only source of the basic materials that would be needed to establish human habitation on Mars.
(D) No significant benefit would result from establishing human habitation on Mars.
(E) Mars is not a practical source of the basic materials required for establishing human habitation there.
20 Jun 2026, 13:30
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To establish a human colony on Mars would involve assembling tremendous quantities of basic materials at the site of the colony. But because the costs of transporting such materials through space would be so high, it will not be economically feasible to colonize Mars.
Which one of the following is an assumption required by the argument?
The argument says colonizing Mars would require huge amounts of basic materials, and then concludes that colonization would not be economically feasible because transporting those materials through space would be too expensive. The key missing link is that those materials would actually need to be transported through space, rather than obtained on Mars itself. If Mars could supply the materials, the transportation-cost argument would lose its force.
(A) Only if the cost of transporting materials from Earth to Mars decreases will human habitation be established on Mars.
This is too strong. The argument does not need to assume that lower Earth-to-Mars transport cost is the only possible way colonization could happen.
(B) The cost of transporting basic materials through space is not expected to decrease in the near future.
This is not required. Even if costs decrease somewhat, they may still remain too high. The argument needs to rule out a more direct alternative: getting the materials on Mars.
(C) Earth is the only source of the basic materials that would be needed to establish human habitation on Mars.
This is too strong. The argument does not need Earth to be the only possible source. The materials could come from somewhere else in space and still involve costly transportation.
(D) No significant benefit would result from establishing human habitation on Mars.
This is not required. The argument is about economic feasibility based on costs, not about whether colonization would have benefits.
(E) Mars is not a practical source of the basic materials required for establishing human habitation there.
This is correct. If Mars itself were a practical source of the needed materials, then the colony might not require transporting tremendous quantities of materials through space. So the argument depends on assuming that Mars is not a practical local source of those materials.
Answer: (E)
Which one of the following is an assumption required by the argument?
The argument says colonizing Mars would require huge amounts of basic materials, and then concludes that colonization would not be economically feasible because transporting those materials through space would be too expensive. The key missing link is that those materials would actually need to be transported through space, rather than obtained on Mars itself. If Mars could supply the materials, the transportation-cost argument would lose its force.
(A) Only if the cost of transporting materials from Earth to Mars decreases will human habitation be established on Mars.
This is too strong. The argument does not need to assume that lower Earth-to-Mars transport cost is the only possible way colonization could happen.
(B) The cost of transporting basic materials through space is not expected to decrease in the near future.
This is not required. Even if costs decrease somewhat, they may still remain too high. The argument needs to rule out a more direct alternative: getting the materials on Mars.
(C) Earth is the only source of the basic materials that would be needed to establish human habitation on Mars.
This is too strong. The argument does not need Earth to be the only possible source. The materials could come from somewhere else in space and still involve costly transportation.
(D) No significant benefit would result from establishing human habitation on Mars.
This is not required. The argument is about economic feasibility based on costs, not about whether colonization would have benefits.
(E) Mars is not a practical source of the basic materials required for establishing human habitation there.
This is correct. If Mars itself were a practical source of the needed materials, then the colony might not require transporting tremendous quantities of materials through space. So the argument depends on assuming that Mars is not a practical local source of those materials.
Answer: (E)
22 Jun 2026, 11:39
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Negation test where we negate E: Mars is a practical source of the required materials.
If that were true, we would not need to transport tremendous quantities from elsewhere, so the argument's conclusion that colonization is not economically feasible because of transportation costs falls apart.
If that were true, we would not need to transport tremendous quantities from elsewhere, so the argument's conclusion that colonization is not economically feasible because of transportation costs falls apart.
yc168
