Which one of the following explains most aneurysms? A. Cystic medial necrosis of the wall of the aorta B. Atherosclerotic weakening of the vascular wall C. Anatomic weakness in the wall of arteries...

Which one of the following explains most aneurysms?

A. Cystic medial necrosis of the wall of the aorta

B. Atherosclerotic weakening of the vascular wall

C. Anatomic weakness in the wall of arteries at a branching point

D. Vasculitis of large arteries