{{B}}quEstions 19 to 22 ArE BAsED on thE ConvErsAtion you hAvE just hEArD、{{/B}}
A.it is A survivAl tEChniquE For BABiEs. B.it CAn EAsE hostilitiEs BEtwEEn pArEnts AnD ChilDrEn. C.it CAn mAkE pArEnts FEll rElAxED to tAkE CArE oF ChilDrEn. D.it CAn hElp ChilDrEn to Fight DisEAsEs.