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In order to reduce traffic congestion and raise revenue for the city, the mayor plans to implement a charge of $10 per day for driving in the downtown area. Payment of this charge will be enforced using a highly sophisticated system that employs digital cameras and computerized automobile registration. This system will not be ready until the end of next year. Without this system, however, mass evasion of the charge will result. Therefore, when the mayor’s plan is first implemented, payment of the charge will not be effectively enforced.

Which one of the following is an assumption on which the argument depends for its conclusion to be properly drawn?

Premise:
The mayor plans to implement a charge for driving.
Mass evasion of the charge will result unless the highly sophisticated system is used.
This system will not be ready until the end of next year.

Conclusion:
If the mayor's plan is first implemented, the payment of the charge will not be effectively enforced.

The conclusion states that the payment of charge will not be effectively enforced because of mass evasion. However, the mass evasion is due to the lack of that highly sophisticated system. This means that the mayor's plan to charge for driving will be implemented before that system is ready, or before the end of next year. Choice A states this logic well.

do you know what source of this question is?

to all test takers, using POE, A is left. Here, ones can see that an assumption is much different from a weaken. In this question, the assumption is what makes the conclusion hold true. In A, if the charge is implemented after the end of the year, then the conclusion is no longer true.
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hello, in this question, can the answer (A) also be treated as an inference?
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Hi,

I think this is a stretch! Focus on the precise wording in the passage: This system will not be ready until the end of next year.

Does the passage state that the plan will start before the system is ready? No, it just says that the system will not be ready until end of next year. It does not specify when the plan will begin. I dont believe it can be considered a valid inference because there is still quite some ambiguity in the timeline.

Hope this helps!
aasthudragonpixie
hello, in this question, can the answer (A) also be treated as an inference?
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