medium · GMAT Verbal Reasoning
A logistics company found that although their new routing software reduced total driver hours by 10%, the total fuel expenditure remained unchanged. The company spokesperson concluded that the new routes must be significantly less fuel-efficient per mile than the old routes.
Which of the following, if true, most seriously weakens the spokesperson’s conclusion?
- The price of fuel increased by 11% during the period the new software was implemented
- Drivers reported higher levels of satisfaction with the new routing software compared to the previous system
- The company recently replaced 5% of its fleet with newer, more fuel-efficient vehicles
- Total driver hours constitute the largest single operating expense for the logistics company
- Most of the reduction in driver hours came from avoiding traffic congestion rather than shorter distances
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