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
What is the effect of soft tissue liner under the denture on the residual ridge? 
Select and explain. 
A. Increases pressure threshold for ridge, B. Decreases pressure threshold for ridge, C. Does not depend on it, D. Depends on basal tissue
A: Increases pressure threshold for ridge
Answer: A: Increases pressure threshold for ridge 
Explanation: Soft tissue liners increase the capacity of stress or load distribution throughout the ridge.