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 shorten dental arch concept? 
Select and explain. 
A. Patient perception of functional compromise as well as benefit by not replacing missing molars., B. Distal & labial migration of most posterior teeth by not replacing missing molars., C. Supraeruption of opposite arch teeth by not replacing missing molars, D. None of the above
A: Patient perception of functional compromise as well as benefit by not replacing missing molars.
Answer: A: Patient perception of functional compromise as well as benefit by not replacing missing molars. 
Explanation: Shorten dental arch:

Healthy & stable dental arch/dentition in which posterior molar teeth are missing.
With stability and limited but sufficient masticatory ability, posterior missing teeth are not replaced.
It always shows compromise v/s benefit ratio by replacing/not replacing the missing teeth.