This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System Pa 3, Subject name: Physiology
Arrange the following physiological events in the sequence that occurs on exposure to hypoxia: A. Reduced conductance of hypoxia-sensitive K+ channels B. Ca2+ influx C. Decreased K+ efflux D. Exocytosis 
Select and explain. 
A. B-C-D-A, B. D-B-A-C, C. A-C-B-D, D. C-B-D-A
C: A-C-B-D
Answer: C: A-C-B-D 
Explanation: None