whAt DoEs thE spEAkEr imply wAs thE purposE oF linColn's spEECh
A．to suggEst ChAngEs to govErnmEnt struCturE.
B．to CritiCizE thE prACtiCE oF slAvEry.
C．to ConvinCE thE south to surrEnDEr.
D．to inspirE northErnErs to support thE wAr.