This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Patients with Classic Von Willebrands disease have: \nSelect and explain. \nA. A decreased bleeding time, prolonged APTT, B. A prolonged bleeding time, decreased APTT, C. A decreased bleeding time, decreasedAPTT, D. A prolonged bleeding time, prolonged APTT', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A prolonged bleeding time, prolonged APTT', 'role': 'assistant'}]