Pt with complete denture complain from tightness of denture in morning then become good this due to.. relif of denture

Pt with complete denture complain from tightness of denture in morning then become good this due to:
A) relif of denture.*** (because there may be pressure points or areas that the tissues will try to Adjust to it throughout the day)
B) lack of cheeck elastisty (pressure on the flanges <> displacement of denture)
C) poor post dam (no posterior seal <> displacement of denture).