The following pulmonary function data is obtained from a 72-year-old male: Percent (%) of Predicted Actual value (%), SVC 81, FVC 79, FEV1.0 /FVC % 70, FEF25-75 69, FEF200-1200 63, DLCO 16. The respiratory therapist should interpret this data as
A. asthma
B. sarcoidosis
C. pulmonary emphysema
D. severe diffusion impairment
