A patient with a 30-pack year smoking history and PMH of an MI 5 years ago presents with intermittent lower extremity pain. The pain is worse when the leg is elevated and becomes pale in color. The patient states they are unable to go on their nightly walk because half-way through they develop severe calf pain that relieves with rest. What is the most likely diagnosis?
A. peripheral arterial disease
B. peripheral venous disease
C. deep vein thrombosis
D. intermittent claudication