Which of the patients is at highest risk for formation of a venous thromboembolism (VTE)? Group of answer

Which of the patients is at highest risk for formation of a venous thromboembolism (VTE)? Group of answer choices An 81-year-old female patient with past medical history of arteriovenous malformation (AVM) who suffered a hemorrhagic stroke 3 years ago A 79-year-old male patient with a history of diabetes and ischemic stroke who is post op day 2 following resection of malignant lung mass. A 78-year-old frail female patient with osteoporosis who attends physical therapy three times weekly An 80-year-old male patient who is receiving oral antibiotics on an outpatient basis for treatment of community-acquired pneumonia