Which of the Following Risk Factors Is Most Strongly Associated with the Development of Peripheral Artery Disease

Mr. Santos, a 60-year-old Male, Presents to the Clinic with Complaints of Intermittent Claudication and Pain in His Lower Extremities While Walking. He Also Mentions That His Feet Feel Cold and Appear Pale When Elevated. Mr. Santos Has a History of Smoking for the Past 30 Years and Has Been Diagnosed with Diabetes Mellitus for the Past 10 Years