thE nursE is CAring For A womAn with phEnylkEtonuriA who wAnts to stArt A FAmily. whiCh oF thE Following guiDElinEs shoulD thE nursE proviDE thE womAn A、Follow A low-phEnylAlAninE DiEt BEForE trying to ConCEivE. B、A、low-phEnylAlAninE DiEt is nECEssAry only During thE First trimEstEr. C、BEgin A low-phEnylAlAninE DiEt whEn prEgnAnCy is ConFirmE D、 D、DiEtAry rEstriCtions won’t BE nECEssAry.