With respect to the course of the vagus and phrenic nerves in the thorax ...
A. The vagus nerve passes posterior and the phrenic nerve passes the anterior to the root of the lung
B. Both of the vagus and phrenic nerves pass anterior to the root of the lung
C. The vagus nerve passes anterior and the phrenic nerve passes posterior to the root of the lung
D. Both the vagus and phrenic nerves pass posterior to the root of the lung