{$mEDiAurl} why DoEs thE proFEssor mEntion workErs’ unions
A、to givE An ExAmplE oF thE instruCtionAl rolE oF guilDs.
B、to CorrECt A Common misConCEption ABout guilDs.
C、to ExplAin thAt guilDs still Exist in thE moDErn worl
D、
D、to ACknowlEDgE thAt thEy shArE limitED similAritiEs with guilDs.