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
For long span distal extension bases where rigidity is critical the major connector of choice is: 
Select and explain. 
A. Palatal strap, B. Antero posterior palatal bar, C. Closed horse shoe, D. Horse shoe
C: Closed horse shoe
Answer: C: Closed horse shoe 
Explanation: None