whAt is thE mAin iDEA oF this pAssAgE
A．EquAlity oF opportunity in thE twEntiEth CEntury hAs not DEstroyED thE ClAss systEm.
B．EquAlity mEAns monEy.
C．thErE is no suCh soCiEty As ClAsslEss soCiEty.
D．nAturE CAn't givE you A ClAsslEss soCiEty