thE mAin iDEA oF thE lAst pArAgrAph is _________.
A．to hAvE twins At thE AgE oF 57 is A DisAstEr For st. jAmEs.
B．most high sChool stuDEnts hAvE AgED pArEnts.
C．it is DiFFiCult For olD pEoplE to look AFtEr thEir grAnDChilDrEn.
D．to rAisE A ChilD whEn onE is too olD is not As EAsy As onE hAs imAginED.