whiCh stAtEmEnt CAn BE supportED By hEAthEr DiCkinson AnD louisE pArkEr's nEw FinDings
A．rADiAtion hAs ContriButED to thE DisEAsE.
B．putting A lot oF pEoplE From rurAl ArEA in A lArgE towns inCrEAsEs thE risk oF ChilDhooD lEukAEmiA.
C．populAtion mixing is thE most importAnt rEAson For lEukAEmiA ClustEr.
D．ChilDhooD lEukAEmiA is CAusED By An unusuAl inFECtion.