What Conclusions Can You Draw from the Following Data, Obtained

Multiple Choice

What conclusions can you draw from the following data, obtained from a 41-year-old man who admits to "occasional smoking" but otherwise reveals no past history of pulmonary problems?

A) Results indicate small airway obstruction.
B) Results indicate generalized airway obstruction.
C) Results indicate a restrictive lung disorder.
D) Results indicate a combined disease process.