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 purpose of beading of the major connector is/are: 
Select and explain. 
A. To ensure intimate tissue contact., B. To provide visible finishing line for the casting., C. To transfer the major connector design to the investment., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: None