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
The oral drive theory to explain thumb sucking habit was given by 
Select and explain. 
A. Benjamin, B. Sears and wise, C. Sigmund freud, D. Scheldon
B: Sears and wise
Answer: B: Sears and wise 
Explanation: None