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
Guiding planes are: 
Select and explain. 
A. Located adjacent to the edentulous area, B. Located far anterior to the edentulous area, C. Helps in the stability of the denture, D. Provides a different path of insertion and removal
A: Located adjacent to the edentulous area
Answer: A: Located adjacent to the edentulous area 
Explanation: None