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': 'Tumorgenesis in Aging is due to: \nSelect and explain. \nA. Telomerase reactivation, B. Telomerase inactivation, C. Increased apoptosis, D. Suppression of proto-oncogenes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Telomerase reactivation', 'role': 'assistant'}]