thE primAry purposE oF thE pAssAgE is to
A．AnAlyzE A CurrEnt trEnD in rElAtion to thE pAst
B．DisCuss A pArtiCulAr solution to A long-stAnDing proBlEm
C．AnAlyzE ChAngEs in thE wAy A long-stAnDing proBlEm is viEwED
D．Apply A gEnErAlizAtion to An unusuAl situAtion
E．(E) DEsCriBE An olD ApproACh By ContrAsting it with A nEwEr ApproACh