{$mEDiAurl}
ACCorDing to thE proFEssor, why DoDiAnA AnDCAmpBEll monkEys not FightA．Both spECiEs livE in thE sAmE ArEA inAFriCA、
B、thEDiAnA monkEys ArE too smAll to AttACk othEr spECiEs.
C．thE two groups ArE not in CompEtition For FooD、
D．CAmpBEll monkEys ArE morE likEly to AttACk putty-nosED monkEys.