wE CAn inFEr From thE pAssAgE thAt ______.
A．thErE is littlE DistinCtion BEtwEEn spECiAlisAtion AnD proFEssionAlisAtion
B．AmAtEurs CAn CompEtE with proFEssionAls in somE ArEAs oF sCiEnCE
C．proFEssionAls tEnD to wElComE AmAtEurs into thE sCiEntiFiC Community
D．AmAtEurs hAvE nAtionAl ACADEmiC soCiEtiEs But no loCAl onEs