A) arch of the aorta, left main bronchus, diaphragm
B) arch of the azygos vein, left main bronchus, diaphragm
C) left brachiocephalic vein, arch of the azygos vein, diaphragm
D) arch of the aorta, left main bronchus, left main pulmonary vein
E) left brachiocephalic vein, arch of the aorta, left main pulmonary vein