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: Dental
Among various glands, salivary gland secretion is unique in that, its secretions are controlled by 
Select and explain. 
A. Hormones, B. Nerves, C. Chemicals, D. All of the above
B: Nerves
Answer: B: Nerves 
Explanation: None