Among the safest of all modes of transportation, strict federal regulations require that airplanes be in better condition than mostautomobiles .
A. strict federal regulations require that airplanes be in better condition than most automobiles
B. airplanes' strict federal regulations require that they be in better condition than most automobiles
C. airplanes are required by strict federal regulations to be in better condition than most automobiles
D. the strict federal regulations require that
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A. strict federal regulations require that airplanes be in better condition than most automobiles
B. airplanes' strict federal regulations require that they be in better condition than most automobiles
C. airplanes are required by strict federal regulations to be in better condition than most automobiles
D. the strict federal regulations require that
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