how DoEs thE proFEssor ClAriFy thE points shE mAkEs ABout slAng
A、By ClAiming thAt slAng is ACCEptED By thE mAjority For FormAl usAgE.
B、By stAting thAt it is unDErstooD By thE mAjority But not FounD in DiCtionAriEs.
C．By illustrAting thAt slAng is unDErstooD By A rEstriCtED group oF spEAkErs.
D．By inDiCAting thAt it is unDErstooD By spEAkErs But not ACCEptED As FormAl usAg