The nurse is reviewing the risk factors for venous disease. Which of these situations best describes a person at highest risk for the development of venous disease?

A. Older adult taking anticoagulant medication: Anticoagulants reduce the risk of thrombosis. B. Person who has been on bed rest for 4 days: Prolonged immobility reduces muscle contraction, leading to decreased venous return and increased risk of venous stasis and DVT. C. Person with a 30-year smoking habit: Smoking is a risk factor for arterial disease rather than venous disease. D. Woman in her second month of pregnancy: Pregnancy increases venous pressure but is more significant in the third trimester.