ACCorDing to pEtEr wArD's rEsEArCh, _________.
A．90% oF AnimAls AnD plAnts wEnt ExtinCt 250 million yEArs Ago
B．DinosAurs DiED oFF As A rEsult oF mEtEor impACts
C．thE "grEAt Dying" hAs muCh to Do with volCAniC ACtivity
D．gloBAl wArming plAyED A minor pArt in thE "grEAt Dying"