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The burden of maintaining the U.S. highway system falls [#permalink]
07 Jan 2008, 16:54
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The burden of maintaining the U.S. highway system falls disproportionately on the trucking industry. Trucks represent only about 10 percent of the vehicles on U.S. roads. Yet road use taxes assessed on trucks amount to almost half the taxes paid for highway upkeep and repair. Which of the following, if true, would most weaken the argument above? (A) The trucking industry has enjoyed record after-tax profits in three of the past four years. (B) Because of their weight, trucks cause over 50 percent of the damage sustained by highway surfaces each year. (C) Without an economically viable trucking industry, the cost of goods in the United States would rise significantly. (D) Road use taxes paid by trucking companies have decreased by 3 percent over the past five years. (E) Due to years of neglect, U.S. highways today are badly in need of major repairs and rebuilding.
The argument is that "The burden of maintaining the U.S. highway system falls disproportionately on the trucking industry." Choice B justifies why the burden falling on the trucking industry is NOT disproportionate.
how does B weaken the argument? can any1 explain plzzz?