whiCh oF thE Following is not thE rEAson For thE us lEss progrEss in longEvity thAn othEr CountriEs
A．thE AmEriCAns ArE gEtting FAttEr thAn thEy usED to BE.
B．somE oF thE poor CAnnot AFForD thEir mEDiCinE Cost.
C．thE AmEriCAns Drink morE AlCohol thAn pEoplE Do in othEr CountriEs.
D．oF thE inEquAlity Existing in thE unitED stAtEs.