Which of the following, if true, most seriously weakens the argument?
The new trains are designed to require regularly scheduled maintenance between trips less frequently than the old trains.
This statement suggests that the new trains will be able to operate more efficiently, potentially leading to shorter overall travel times despite the speed limitation imposed by the tracks. If the new trains require less maintenance, they could spend more time in service, which may counteract the effect of their speed being limited to that of the older trains.
While this choice highlights the popularity of older trains, it does not address the argument regarding speed and travel time. The preference for older trains does not diminish the fact that the new trains are faster, making this option irrelevant to the argument's core issue.
This option supports the argument by indicating that the terrain restricts the speed of all trains, including the new ones. Therefore, it does not weaken the argument; instead, it reinforces the conclusion that the new trains will not make the trip faster.
This statement directly weakens the argument by implying that the new trains can operate longer without downtime, potentially allowing them to complete the journey in a similar or shorter time than the older trains, despite their speed limitations.
This choice does not weaken the argument as it focuses on the travel preferences of individuals rather than the operational capabilities of the new trains. It suggests an alternative mode of transport but does not affect the argument about the trains' speeds.
This option strengthens the argument by indicating that longer stops would increase total travel time, further supporting the conclusion that the new trains will not be faster overall.
The argument claims that the new trains cannot travel faster than the old ones due to track limitations. However, if the new trains require less maintenance, they may operate more efficiently and could complete the journey in less time. Thus, option C provides a critical counterpoint that undermines the original argument, suggesting that maintenance frequency is an important factor in overall travel time.
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