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
During exercise: 
Select and explain. 
A. Cerebral bood flow increases if there is increase in systolic blood pressure, B. Body temperature increases, C. Blood flow to muscle increases after 1½ minute, D. Lymphatic flow from muscle decreases
B: Body temperature increases
Answer: B: Body temperature increases 
Explanation: None