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I was confused between A and B.

A attacks the assumption that only a freeway passing 5 miles away can be constructed for economic growth.

B doesn't directly attack the reasoning of the engineer.Its vague and partially weakens.Other causes doesn't directly disapprove that a freeway could still help.

So A is the ans
Bunuel
Civil Engineer: Trade between the northern and southern cities of our state has stagnated greatly. There are few reliable methods of transporting goods between these two groups of cities, so in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

Which of the following, if true, most seriously weakens the civil engineer’s reasoning?

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system


 


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i pick B.

Reasoning, the civil engineer assumes that lack of transport system between two cities is the only the most important reason for stagnated trade.
what if there are other reasons. B correctly addresses this.
B
Bunuel
Civil Engineer: Trade between the northern and southern cities of our state has stagnated greatly. There are few reliable methods of transporting goods between these two groups of cities, so in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

Which of the following, if true, most seriously weakens the civil engineer’s reasoning?

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system


 


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The answer is A.

The engineer's argument is that constructing a 5-mile highway is necessary to promote economic growth. Several aspects of this proposal are subject to scrutiny:

1. Is the proposal feasible?
2. Could the proposal have adverse effects?
3. Is the proposal easy to implement?
4. Is this the only solution? Are there alternative solutions that could achieve the same goal?

Option A aligns with the points we need to discuss. It questions whether the highway must be exactly 5 miles long, suggesting that a 10-mile highway could also achieve the intended purpose.
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we are given that freeway system to be constructed between 2 cities that is maximum 5 miles long

analyzing options, A directly weakens as same can be achieved in 10 miles
B-also weakens that there are other method as well
other options are irrelevant hence A is the answer
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Answer

(B) There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.

Explanation

The Engineer's Logic:
The engineer sees a problem (stagnant trade) and assumes a cause (bad transportation). He then proposes a solution (build a freeway) to fix that specific cause.

How to Weaken the Argument:
The best way to weaken this kind of argument is to show that the assumed cause is wrong.

Why (B) is the Correct Answer:
Choice (B) does exactly that. It states that there are other, more important reasons for the lack of trade. If this is true, then the engineer has misdiagnosed the problem. Building a brand-new freeway would be a waste because it wouldn't fix the real issues (like maybe high taxes or no demand for goods), and therefore wouldn't achieve the goal of spurring economic growth. It attacks the very foundation of the engineer's reasoning.
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Conclusion: in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

Which of the following, if true, most seriously weakens the civil engineer’s reasoning?

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
This actually strengthens the reasoning. 5 miles away is a lot better than 10 miles

B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
Other important causes for the lack of trade doesn't mean that we shouldn't build a freeway system. The freeway system may be a necessary condition and need to be built anyway.

C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
The budget issue doesn't weaken the reasoning.

D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
This actually strengthens the reasoning.

E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system
This shows that there can be another option that help spur economic growth. This is the right answer.

Answer: E
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A. We need to look for something that talks about the freeway is not necessarily required and this is about distnace.
B. The essay doesn't focus on other reasons but more on that whether the existing ways of transport are enough.
C. This is out of scope and nothing like that is suggested in the para.
D. This again focuses on the distance
E. This is the only options that talk that the negates that WE MUST BUILD a freeway system as it is suggesting that working on otherways of transport can improve.
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Premise: Trade stagnation is due to lack of reliable transport.

Conclusion: Therefore, a freeway within 5 miles of each city must be built.

(A) attacks the conclusion's necessity by showing that a less stringent freeway system (10 miles) would still work.

Thus, it breaks the premise → conclusion connection and is a textbook Weaken answer.
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  • A freeway within 10 miles would still increase trade - weakens the strict 5-mile requirement, but not the idea that a freeway helps trade
  • Other more important causes are behind the lack of trade - weakens the core reasoning by suggesting that transportation is not the main problem
  • Budget is too small - affects feasibility, not the logic of the solution
  • Closer transportation systems often boost trade - supports the engineer’s claim
  • Existing methods can be improved without building a freeway - suggests alternatives, but doesn’t fully refute the freeway’s effectiveness
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A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
This directly weakens the engineer's claim that the freeway must be within five miles of each city. If ten miles is good enough, the strict five-mile constraint is unnecessary. Correct.

B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
This points to other factors besides transportation, possibly weakening the argument that the freeway is the solution. However, it doesn’t show that the freeway wouldn’t help. Incorrect.

C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
This is about feasibility, not reasoning. It doesn’t show that the freeway wouldn’t help trade, only that we can’t afford it. Out of scope.

D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
If anything, this supports the civil engineer’s plan. Incorrect.

E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system
This weakens the need for a new freeway, but only "to some extent". It doesn’t show that the freeway wouldn't still be better overall. Also nothing about the proximity to the city is mentioned. Incorrect.
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Answer: A) weakens the engineer's reasoning that to spur trade, we must build a freeway no more than 5 miles away
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Premise: Trade between the northern and southern cities of our state has stagnated greatly. There are few reliable methods of transporting goods between these two groups of cities.

Conclusion: In order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

So author is connecting stagnation of trade with transportation of goods between two group of cities.
To weaken it we need to find something that author fails to consider important for economic growth.

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
Building the freeway 10 miles or 5 miles or any miles may or may not be sufficient enough to conclude the statement and hence this choice does nothing to our argument.

B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
If there are other important causes for lack of trade, and hence lack of economic growth then we have other important causes which weakens the current argument that by building freeway will spur economic growth.
This weakens the argument.

C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
This brings irrelevant information. We have nothing to do with whether the state can afford it or not.

D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
Since growth in commercial traffic between two groups of cities is most often associated with closeness of transportation with the cities, so we can say that building the freeway system will lead to growth in economic. This is a strengthener.

E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system
We cannot say that improving to some extent will lead to economic growth.

Hence B is correct option
Bunuel
Civil Engineer: Trade between the northern and southern cities of our state has stagnated greatly. There are few reliable methods of transporting goods between these two groups of cities, so in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

Which of the following, if true, most seriously weakens the civil engineer’s reasoning?

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system


 


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Problem: Trade between northern and southern cities has stagnated due to few reliable methods of transporting goods.
Proposed Solution: Build a freeway system connecting the cities, passing no more than five miles from each.
Desired Outcome: Spur economic growth.
Underlying Assumption: The only or primary cause of trade stagnation is the lack of reliable transportation, and the specific solution (a close-proximity freeway) is necessary and sufficient to address this problem and spur growth.



A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.

This directly undermines the premise that the freeway must pass within five miles of each city. If ten miles suffices, the five-mile constraint is arbitrary and unnecessary.However, it doesn't weaken the core idea that a freeway is needed to improve trade. It primarily attacks the detail of the plan, not the fundamental premise.
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.

This is a strong weakener. If there are other, more important causes, then addressing only the transportation issue with a freeway might not actually spur significant economic growth, or it might not solve the core problem.
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.

This points out a financial obstacle, not a reasoning flaw. It doesn’t refute that such a freeway would or wouldn’t spur trade, only that it may be unaffordable. It does not weaken the logic.
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.

That observation supports the engineer’s reasoning, not contradicts it. It actually strengthens the argument that a freeway close to cities would increase trade, irrelevant as a weakener
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system.

This option offers an alternative solution to the identified problem. The engineer states "few reliable methods" is the problem and proposes a freeway. If the reliability of existing methods can be improved (e.g., by repairing roads, improving rail lines, or increasing truck availability) without building a freeway, then the freeway might not be a necessary condition for increasing trade or spurring economic growth. It suggests the freeway might not be necessary, but it doesn't necessarily mean the freeway wouldn't work or that the engineer's assessment of the transportation problem is incorrect. It just means there's another path
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The conclustion is that: in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city



A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
  • It acknowledges the idea that the engineer proposes, but it adjusts the five mile buffer to ten miles; not the best weakner, but let's keep it
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
  • We are not concerned if there are other causes for the lack of trade, we want to weaken the reasoning given by the engineer, which is why the freeway proposed is not going to improve trade/spur economic growth in the state. Eliminate
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
  • Whether or not the state has the budget, that is, they are able to implement the engineer's proposal is irrelevant. Eliminate
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
  • This brings in a new issue altogether (growth in commerical traffic). We are not interested in the issues that may or may not arise after the proposal is implemented. Eliminate
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system
  • Again, the reliability of existing methods is not in question, even if it can be improved without the proposed freeway, we want to know why implementing the freeway wouldnot improve trade/spur economic growth. Eliminate

Best choice seems to be A. So that's our answer.
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A) Directly weakens, let's hold it (the engineer says " no more than five miles away from each city", but the option says 10 miles suffices)
B) Doesnt weaken as this option acknowledges it is in addition to lack of other reasons.
C) Doesnt matter what the budget is
D) Strengthens in a way
E) "some extent", we want to spur economic growth
So A.
Bunuel
Civil Engineer: Trade between the northern and southern cities of our state has stagnated greatly. There are few reliable methods of transporting goods between these two groups of cities, so in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

Which of the following, if true, most seriously weakens the civil engineer’s reasoning?

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state.
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities.
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system.
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities.
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system


 


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Civil Engineer: Trade between the northern and southern cities of our state has stagnated greatly. There are few reliable methods of transporting goods between these two groups of cities, so in order to spur economic growth in this state, we must build a freeway system, connecting the two groups of cities, that passes no more than five miles away from each city.

Which of the following, if true, most seriously weakens the civil engineer’s reasoning?

A. Building a freeway system that passes as much as ten miles from each city would be sufficient to greatly increase trade between the northern and southern cities of the state..... This explains an alternate solution to increase the trade between two cities.....Could be the answer
B. There are other, more important causes for the lack of trade between the northern and southern cities of the state in addition to a lack of reliable methods of transporting goods between these two groups of cities......Out pf scope
C. The state’s infrastructure budget is not currently large enough to finance the construction of a freeway system........No bearing on conclusion
D. Growth in the commercial traffic between two groups of cities is most often associated with the closeness of the transportation system with the cities......no
E. The reliability of existing methods of transporting goods between the northern and southern cities of the state can be improved to some extent without building a freeway system....only to some extent.....No

Maybe A
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E says
Maybe we don't need a freeway; we could try something else to fix the transportation.

B says
Even if you fix the transportation (with a freeway or otherwise), it won't solve the bigger problem of stagnant trade because transportation isn't the real issue.

Option B is more damaging. It suggests the entire project is based on a false premise and would be a waste of resources, failing to achieve its ultimate goal. Option E merely suggests a different path to the same goal. Therefore, B most seriously weakens the engineer's reasoning.

The correct answer is B.
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