What is shorten dental arch concept?: (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
Answer is A. 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.