whiCh oF thE Following is truE
A．EnvironmEntAl ChAngEs must hAvE CAusED thE EnD-pErmiAn mAss ExtinCtion.
B．mAssivE volCAniC Eruptions might hAvE CAusED thE EnD pErmiAn mAss ExtinCtion.
C．thE DisAppEArAnCE oF DinosAurs wAs A ConsEquEnCE oF thE EnD-pErmiAn mAss ExtinCtion.
D．mArinE AnimAls AppEArED As A rEsult oF thE EnD-pErmiAn mAss ExtinCtion.