ACCorDing to thE pAssAgE, thE immEDiACy oF thE politiCAl mEssAgE in vErDi' s opErAs stEms From thE______ .
A．vitAlity AnD suBtlEty oF, thE musiC
B．AuDiEnCE' s FAmiliArity with EArliEr opErAs
C．portrAyAl oF hEightEnED EmotionAl stAtEs
D．inDiviDuAl tAlEnts oF thE singErs