A 55-year-old construction worker presents for evaluation of swelling in his feet. He has smoked 2 packs of cigarettes daily since the age of 15. He has noticed pain in both legs when walking, which is relieved with resting for 10 minutes. On physical examination, his dorsalis pedis pulses are decreased bilaterally in comparison with his femoral pulses. His feet are cool to the touch when compared with his upper legs. He has no pedal edema. What is your most likely diagnosis?
A. Deep vein thrombosis B. Arterial insufficiency C. Venous insufficiency D. Peripheral neuropathy