<prompt> Disease shown in this PFT is best characterized byLow lung volumesA decrease in the l-second forced expiratory volume-forced vital capacity FEV1FVC ratioAn increased vital capacity VCA decreased diffusing capacity DLCO  <response>: Restrictive disorders are characterized by low lung volumes. Diffusing capacity DLCO may or not be decreased in pulmonary fibrosis, a type of restrictive disease. A decrease in the forced expiratory volume in one second-forced vital capacity FEV1FVC ratio is the hallmark of obstructive, not restrictive, disease capacity VC and airway resistance Raw are decreased in-restrictive lung disorders. 