"onE rottEn ApplE spoils thE BArrEl" mEAns ______.
A．rottEn ApplEs CAn Bring DisorDEr to pEoplE's hEAlth
B．it is hArD to ChoosE BAD pErsons From gooD onEs
C．onE BAD pErson in A group CAn inFluEnCE othErs
D．rottEn ApplEs shoulD BE quiCkly thrown AwAy