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': 'Essential for tumor metastasis is: \nSelect and explain. \nA. Angiogenesis, B. Tumorogenesis, C. Apoptosis, D. Inhibition of Tyrosine kinase activity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Angiogenesis', 'role': 'assistant'}]