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: Pharmacology
[{'content': 'Lower dose of dopamine in cardiogenic shock will  increase: \nSelect and explain. \nA. Cardiac output, B. Urine output, C. Heart rate, D. Blood pressure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]