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Apr 2808:00 AM PDT
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17 Dec 2025, 08:33
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A This undercuts the idea that vehicle standards lowered overall pollution, but it doesn't attack the share drop evidence directly. Still weakens.
B It supports officials' idea, doesn't weaken.
C This means part of the drop in share is due to redefining categories, not real reductions from standards. Directly undermines the evidence officials use. It's a stronger weakener than A because it removes the basis for their inference entirely.
D Irrelevant to share of emissions or standards' effectiveness.
E This doesn't attack the officials' reasoning. It could be consistent with their claim (vehicle standards helped but other sources overwhelmed).
The correct answer is C
B It supports officials' idea, doesn't weaken.
C This means part of the drop in share is due to redefining categories, not real reductions from standards. Directly undermines the evidence officials use. It's a stronger weakener than A because it removes the basis for their inference entirely.
D Irrelevant to share of emissions or standards' effectiveness.
E This doesn't attack the officials' reasoning. It could be consistent with their claim (vehicle standards helped but other sources overwhelmed).
The correct answer is C
17 Dec 2025, 08:35
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A. Not as relevant since even if it suggests standards improved efficiency per vehicle, the total emissions from cars may not have reduced
B. Irrelevant as this doesent explain what is needed. It doesent even attack the emission statistics or the given statements.
C. Relevant since if this is true, it attacks the reliability of the data. Emissions did not fall at all and the percentage drop (27% to 19%) is an error.
D. Irrelevant as this talks about distribution but not the cumulative totals. It also doesent explain the increase in polution and the decline in share as given above
E. Irrelevant as this just explains why pollution rose but doesent undermine the claim that vehicle standards worked domestically
C.
B. Irrelevant as this doesent explain what is needed. It doesent even attack the emission statistics or the given statements.
C. Relevant since if this is true, it attacks the reliability of the data. Emissions did not fall at all and the percentage drop (27% to 19%) is an error.
D. Irrelevant as this talks about distribution but not the cumulative totals. It also doesent explain the increase in polution and the decline in share as given above
E. Irrelevant as this just explains why pollution rose but doesent undermine the claim that vehicle standards worked domestically
C.
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