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: Physiology
[{'content': 'Glucose is usually transmitted by: \nSelect and explain. \nA. Primary active transport., B. Secondary active transport., C. Facilitated diffusion., D. Simple diffusion.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Glucose is usually transported by facilitated diffusion.', 'role': 'assistant'}]