In the Future,it May Be Possible to Screen for a Number

Multiple Choice

In the future,it may be possible to screen for a number of different types of cancer by a simple blood test.If a blood test indicates a very early stage of lung cancer,where is the most likely place that the tumor will be growing?

A) in the wall of a large bronchus
B) in the wall of an alveolus
C) in the wall of a pulmonary vein
D) in the visceral pleural membrane
E) in the parietal pleural membrane